The Bridlington Mesh — What Are We Even Building?

Chapter 1: Welcome to the Fever Dream

Let me set the scene.

It's a Thursday night in Bridlington. I'm standing at the back of the Harbour Tavern, pint in hand, watching a three-piece band absolutely nail it on a stage the size of a postage stamp. The room is rammed. The sound is good — surprisingly good, for a pub. And I'm thinking, as I always do when I see something that deserves a bigger audience: Why can't this be on telly?

Not in the "they should get a record deal" sense. I mean literally — why can't I, right now, sitting at home in my pants, flip through six different live feeds from six different venues across this town, like some kind of fever-dream BBC Red Button experience?

The answer, of course, is "because that's really bloody hard." But the more I stood there, watching that band, the more I realised: the hard part isn't the technology. The hard part is the thinking. The assumption that you need a million pounds and an OB truck the size of a cruise liner to produce multi-venue broadcast content. The belief that if you can't do it with a URSA Cine and a 100G backbone, you might as well not bother.

I call bollocks to that.

So this series is my attempt to prove it. Welcome to the Bridlington Mesh.

What Is The Bridlington Mesh?

In one sentence: it's a town-wide IP-based broadcast network connecting seven venues to a central production hub, enabling multi-angle, multi-venue live switching for a "Red Button" style experience.

In more sentences: imagine a festival spread across Bridlington — the grand Royal Hall at The Spa, the open-air Spa Gardens, the historic Priory, the proper-pub Black Lion, the stately Sewerby Hall, the intimate Harbour Tavern, and a pop-up stage on South Beach. Now imagine sitting at home and being able to flick between them like channels. The main broadcast switches between venues live, but you can also lock onto any single stage and watch their full set. Programme audio follows the video. It's Glastonbury on iPlayer, except it's Bridlington, and the budget ranges from "what's in my pocket" to "I should probably sit down before I look at this spreadsheet."

The Bridlington Mesh is the technical blueprint for making that happen. But more than that, it's a philosophy — that professional broadcast production isn't a binary switch between "amateur" and "pro." It's a ladder. And every rung is valid.

Who Is This Series For?

Honestly? It's for me. A thought experiment that went a little further than I thought... as usual. But I suspect it's also for you, if any of the following apply:

• You've ever tried to livestream a church service, a school play, or a local band and thought "there has to be a better way to do this with the budget I've actually got"
• You've ever been told you need a £50,000 switcher to produce professional content and felt your soul leave your body
• You run a small venue and want to offer live-streaming without remortgaging your house
• You're a broadcast engineering student who wants to see how the theory actually lands in the real world
• You're the AV volunteer at your local pub and you've got three iPhones, a laptop, and a dream
• You just like watching someone else spend imaginary money on spreadsheets and then rant about Windows updates for 800 words

If any of that sounds familiar: welcome. Pull up a chair. The water's fine, if a little caffeinated.

The Promise

Here's what I'm not going to do: I'm not going to tell you there's one right way to build a broadcast system. I'm not going to hand you a single kit list and say "buy this, you're done." That's not how the real world works.

Here's what I am going to do: I'm going to show you every rung of the ladder. From a £0 phone-and-OBS pub stream that genuinely works, all the way up to an £815,000 cinema-grade broadcast rig with lenses that cost more than my first house. And for every rung, I'm going to tell you what it buys you, what it costs you (in both money and sanity), and — most importantly — why you might pick it.

By the end of this series, you'll know how to produce a multi-venue broadcast with phone cameras and free software. And you'll also know the exact upgrade path to turn that into a broadcast-standard production over time, as your budget and ambition grow.

The knowledge is the same. Only the price tag changes.

The "Red Button" Vision

Let me paint you a picture of the endgame.

It's festival weekend. You open an app — or a website, I'm not fussy — and you're presented with seven options:

Master Feed — The main broadcast. Currently showing the headline act on the Royal Hall stage. The director is cutting between four URSA Cines with Fujinon box lenses that cost more than a family car. The audio is pristine, coming through a Yamaha Rio and a Fairlight panel. It looks like Glastonbury.

Royal Hall — Stick with this channel and you'll get the full set from the main stage, uninterrupted. No cuts away to other venues. Just the headliner, in full cinema-grade glory.

Spa Gardens — Switch here and you're in the open air. Mid-afternoon, sunshine (we're dreaming), a band on the outdoor stage. The production value is still pro — Studio Cameras, 10G networking, proper switching — but the vibe is more festival, less theatre.

The Priory — A stark contrast. Intimate. Acoustic. The camera moves are slower, the lighting is warmer. This is the "sit down and listen" channel.

The Black Lion — Pub rock. The cameras are Blackmagic Pocket Cinema Cameras, the audio is Dante-networked, the whole setup cost about £26k. It looks and sounds fantastic, and you'd never guess it's a fraction of the Royal Hall's budget.

Sewerby Hall — Daytime vibes. Families. The broadcast is coming from phone cameras routed through proper encode/decode hardware. It cost £8,000 and it's broadcasting in 4K. Take a moment to let that sink in.

Harbour Tavern — The smallest room, the biggest heart. Three phone cameras feeding OBS, mixed locally, sent to the hub over SRT. Zero pounds spent on camera hardware. Still broadcasting in 4K. Still part of the mesh.

You flick between them like channels. Each one tells a different story. Each one is produced at a different budget level. And each one proves the same point: the technology is not the barrier.

That's the vision. The next 400,000+ words are how we build it.

How to Read This Series

A few practical notes before we dive in.

If you want the full experience: Start here, read every post in order. Each one builds on the last. By the time you reach Post 6, you'll have a complete mental model of the entire mesh, from a phone in a pub to a 100G spine switch in a hub.

If you're only interested in a specific tier: You can jump to the relevant post. Each post is self-contained enough that you'll get the full picture for that venue and budget level. But consider at least skimming this post — it's where I define the terminology and philosophy that runs through everything.

If you're here for the rants: Look for the ☕ markers. I'll flag them. There's one in Chapter 9 that's been brewing for about three years.

A note on prices: Every price I quote is in GBP, inc VAT unless stated otherwise. I'm in the UK, VAT is 20%, and I refuse to pretend otherwise. I've sourced prices from current retail listings at the time of writing. By the time you read this, they'll have changed. That's not the point. The point is the relative cost — the shape of the spread, not the exact numbers.

A note on tone: Sometimes I'll be technical. Sometimes I'll be sweary. Sometimes I'll spend 500 words describing a cable. This is normal. You'll get used to it.

Right. Enough preamble. Let's build a mesh.

Chapter 2: Why Bridlington?

You might be wondering why, out of every town in the UK, I've chosen Bridlington as the canvas for this sprawling fever dream. Fair question. Let me try to answer it.

The Town

Bridlington sits on the Yorkshire coast, roughly halfway between Scarborough and Spurn Point. It's a town of two halves: the Old Town, clustered around the Priory, and the Harbour/South Shore, where the amusement arcades, fish-and-chip shops, and the Spa complex hug the seafront. It's a classic British seaside resort — Victorian architecture, a sprawling beach, a harbour full of working fishing boats, and enough amusement arcades to keep a generation of slot-machine repairers in business.

It's also a town with an identity complex. It's not quite as polished as Scarborough, not quite as rugged as Filey, not quite as picturesque as Robin Hood's Bay. It's caught somewhere in the middle — a working harbour and a tourist destination trying to coexist without either one winning. The result is a town that feels genuinely lived-in. There's no theme-park gloss. The Spa isn't a heritage exhibit; it's a venue that's been hosting everything from variety shows to punk gigs for over a century. The Priory isn't a museum; it's an active church and community space. The pubs aren't gastropubs with reclaimed scaffolding boards and a craft ale list the length of your arm; they're proper boozers with sticky floors, pool tables, and the best pint of Timothy Taylor's you'll have this side of Keighley.

And that's precisely why it works for the Mesh.

Bridlington has the venue density. Within a mile of the harbour, you've got a grand Victorian ballroom, an outdoor festival space, a medieval priory, two proper pubs (three if you count the one I'm probably forgetting), and a stately home with grounds that could host a small festival on their own. That's seven venues within walking distance of each other, each with a completely different character, each demanding a different production approach. You couldn't design a better testing ground if you tried.

The Seven Venues

Let me take you on a tour. We'll start at the top and work our way down, budget-wise.

The Spa — Royal Hall

Let's get one thing out of the way: I love this building.

The Royal Hall is the main ballroom of The Spa complex, a grade II listed building that's been entertaining Bridlington since 1933. It sits on the seafront, a white wedding-cake of a building with Palladian windows, a barrel-vaulted ceiling, and enough art deco ceiling flush "chandeliers" to make a wedding planner weep with joy. It holds between around 800 - 3,800 people depending on the configuration, and it's hosted everything from ballroom dancing to tribute acts to punk gigs to classical concerts.

The stage is properly sized, the dressing rooms are functional (which is high praise in my experience). I've worked shows here — load-ins, sound checks, front-of-house, Lighting, Sound and Video — and I know every weird corner of that stage. The wing space is tight. The lighting rigging points are... let's call them "characterful."... want to change the rig hight? there a climb into the roof space to work the winch system, The networking and SDI are a bit outstages (1.5G SDI throughout). But it works. It has soul.

For the Mesh, the Royal Hall gets the "Beast" treatment — the unlimited-budget tier. Four URSA Cine 12Ks with Fujinon box lenses. A Yamaha CL5 at FOH. The full broadcast kit. This is where we prove what's possible when you don't have to count pennies. It's the crown jewel, and we're going to treat it like one.

The Spa Gardens

Right outside the Royal Hall doors is the Spa Gardens — an outdoor space set right next to the beach. During the summer season, it hosts live music, and there's a permanent stage structure that can handle bands of a reasonable size.

The gardens are a different beast entirely. Outdoor production means wrestling with the elements — wind noise on mics, camera shading changing by the minute as clouds roll in, the distinct possibility that your entire setup gets rained on. It also means dealing with daylight. Not having the luxury of a blacked-out theatre means you're competing with the sun, which pushes your camera choices towards higher dynamic range and better lens control.

For the Mesh, the Spa Gardens get the prosumer tier — Studio Cameras, 10G networking, the works. The budget sits around £96,000. It's not quite the Beast, but it's nothing to sneeze at. This is the kind of production value you'd expect from a decent OB setup, just delivered over IP.

The Priory

Bridlington Priory has been on this site since 1113. The current building dates from the 13th century, with Victorian additions, and it is old. Properly old. The kind of old that makes you want to whisper. The kind of old where the acoustics are simultaneously stunning and absolutely bloody impossible.

If you've never tried to do live sound in a medieval building: imagine shouting into a cathedral and getting your words back three seconds later, slightly rearranged. The Priory has huge reverb times, weird nodal resonance points, and the kind of natural reverb that would make a BBC sound engineer reach for the bottle of communion wine. But it also has soaring ceilings, incredible natural light through stained glass, and an atmosphere that no modern venue can touch.

For the Mesh, the Priory gets the professional tier — £56,000 worth of broadcast gear. The cameras are Blackmagic Studio Camera 4K Pros. The audio setup is carefully chosen to work with the room, not against it. The whole approach is about capturing the atmosphere without fighting the environment. It's a venue that demands respect, and the kit choices reflect that.

The Black Lion

Now we're talking.

The Black Lion is a proper pub. It's on High Street in the Old Town, a stone's throw from the Priory, and it's exactly what you want from a pub that hosts live music. Low ceilings, brick walls, a fireplace that actually gets used in winter, and a small stage in a back room that has seen some of the most unexpectedly brilliant gigs I've ever walked into.

The production challenge here is space. Or rather, the complete absence of it. There's no room for a traditional production setup. No FOH position that isn't also part of the audience. No backstage to speak of. The band loads in through the fire exit, and you're mixing monitors from a laptop balanced on a window ledge. It's glorious.

For the Mesh, the Black Lion gets the low-cost tier — £26,000. The cameras are Blackmagic Pocket Cinema Cameras, small enough to tuck into corners without dominating the room. The audio runs over Dante, which means minimal cable runs and maximum flexibility. It's real production value on a pub budget, and it proves that you don't need a ballroom to produce broadcast-quality content.

Sewerby Hall & Gardens

A mile or so north of the harbour, Sewerby Hall is a Georgian stately home set in 50 acres of parkland, perched on a cliff overlooking Bridlington Bay. It's the daytime venue — the family-friendly space — with a zoo (yes, a zoo), gardens, and a regular programme of outdoor events in the grounds.

The production challenge at Sewerby Hall is twofold. First, it's spread out — the action isn't in a single room, it's across a large site. Second, the budget is deliberately tight: £8,000. That doesn't buy you a lot, which is the whole point. I mean I when writing this series I thought about putting the unlimited budget setup here as the place is stunning but... We're proving that you can produce a broadcast-quality contribution on a budget that wouldn't buy the lens cap on the Royal Hall's main camera.

The solution is phone cameras for capture, routed through proper encode/decode hardware for transport. It's a hybrid approach that maximises the available budget by spending money on what matters — reliable streaming — and saving it on what doesn't — the camera bodies themselves. The result is a 4K feed from a venue whose total broadcast budget is less than some people spend on a single lens.

The Harbour Tavern

Back to where we started. The Harbour Tavern is a small pub on the harbour front, tucked away down a side street that you'd miss if you weren't looking for it. It's tiny. It's intimate. It's got more character per square foot than any venue in town. And the live music scene here is quietly thriving.

The budget for the Harbour Tavern is zero. Not "we found some spare change down the back of the sofa" zero. Genuinely zero. No money spent on cameras, no money spent on audio gear, no money spent on anything that isn't already in the room.

And yet we're still broadcasting in 4K.

The trick is OBS running on a laptop (the pub already has one for the music quiz), fed by three phone cameras (everyone has a phone) running over WiFi. The phones connect to a local OBS instance that mixes the feeds for in-house screens and produces a single programme feed that gets sent to the hub via SRT. The audio comes from the pub's existing PA setup, grabbed via a £0 software solution (Voicemeeter or similar).

Zero pounds. Three phone cameras. OBS. 4K. That's the Harbour Tavern.

South Beach Pop-up

Finally, the wildcard.

South Beach is the beach that stretches south from the harbour. During the summer, there's sometimes a pop-up stage — a temporary structure right on the sand, hosting bands, DJs, and the occasional ill-advised outdoor event that gets rained off after forty-five minutes.

The production challenge here is simple: there's no infrastructure. No power that isn't a generator. No internet that isn't cellular. No shelter. You're broadcasting from a beach, and the beach does not care about your camera positions.

For the Mesh, South Beach is unique — it's the only venue that doesn't get a local production setup. Instead, the phones feed directly to the hub via the Blackmagic Camera App, which can encode and transmit 4K H.265 directly to a Streaming Decoder. No laptop in the middle. No OBS. Just phones → internet → hub.

It's also the biggest technical risk. Four simultaneous 4K uploads over cellular is no joke. Depending on the network conditions on the day, we might need bonded cellular, or a 5G router, or — worst case — reduced camera count. But if it works, it's the most elegant solution in the whole mesh: zero fixed infrastructure, pure IP, pure mobility.

A Bit of Personal History

I said at the start that this wasn't entirely rational. And here's the truth: I love this town.

I've spent more evenings than I can count at The Spa, working shows , load-ins, sound checks, front-of-house, breakdown, the whole ritual. I've stood in the wings of that stage during a sold-out gig, watching the crowd bounce, feeling the floor shake, and thinking "this is why I do this." I've also stood in that same room at 2am, packing cables into a flight case, covered in dust and sweat, questioning every life choice that led me to this moment. Both are true. Both are part of it.

I've seen the Priory at dusk, with the light coming through the west window, and I've heard what a choir sounds like in that space. I've had pints in the Black Lion after a gig, still buzzing, still talking about that one moment when everything clicked. I've walked the grounds at Sewerby Hall on a summer afternoon and thought about how many families have made memories here.

This isn't just a technical exercise. It's a love letter. I know these rooms. I know their quirks and their problems and their potential. I know which power outlets are reliable and which ones trip if you look at them wrong. I know which rooms have Wi-Fi dead zones and which ones have the perfect natural acoustics. I know the bar staff by name, and I know which days the car parks are a nightmare.

That local knowledge matters. The Bridlington Mesh works because it's grounded in a real place, with real constraints and real opportunities. It's not a theoretical diagram drawn on a whiteboard. It's a roadmap for a town I know.

A Note on Geography

Let me give you a sense of the layout.

The Spa complex sits on South Marine Drive, right on the seafront. The Priory is about half a mile inland, in the Old Town. The Black Lion is a few hundred yards from the Priory, on the same High Street. Sewerby Hall is about a mile and a half north along the coast — walking distance if you don't mind the hill. The Harbour Tavern is on the harbour front, about a five-minute walk from The Spa. South Beach starts at the harbour and stretches south — the pop-up stage could be anywhere along that stretch, depending on permissions and tide.

The whole mesh fits within a circle roughly two miles in diameter. That's important. It means the network distances are short enough that SRT latency (typically 200ms-2s, depending on buffer settings) is the dominant factor, not physical propagation delay. It also means that running cables between venues would be theoretically possible but practically insane — which is exactly why we're using IP instead.

The practical challenges are what you'd expect. Bridlington's internet infrastructure is solid in the town centre but patchy in places — Sewerby Hall's connection may need a dedicated line, and South Beach is entirely dependent on cellular. The geography also means line-of-sight RF links would be possible but pointless; we have the internet, and the internet works.

Why Not Anywhere Else?

Honest answer: it could be anywhere.

You could drop this exact blueprint into Scarborough, Whitby, Filey, or any coastal town with a similar venue density. You could do it inland — imagine a market town with a town hall, a church, a pub, and a community centre. The principles are the same. The specific venues change, but the ladder stays the same.

But Bridlington is the one I know. And the more I thought about it, the more I realised that its specific mix — Victorian grandeur, medieval history, proper pubs, a working harbour, a beach, a stately home — gives us seven completely different production challenges within walking distance. That's rare. Most towns have a couple of venues worth broadcasting from. Bridlington has seven.

So yes, this could be done elsewhere. But it's being done here. And honestly? Once you've stood on South Beach at sunset, with the Spa in the distance and the harbour lights coming on, you'll understand why this is the place.

What Makes a Venue?

Before we move on from the tour, let me address something that might be bugging you. You might be looking at the Harbour Tavern — zero budget, phone cameras, OBS — and thinking: "that's not really the same tier as the Royal Hall with its £815k rig." And you'd be right. They're not the same.

But here's the thing: they're both part of the same broadcast. The viewer at home doesn't see the budget. They see the Royal Hall in cinema-grade 4K, then the Harbour Tavern in OBS-switched phone-camera 4K, and both are available on exactly the same platform. Both feeds arrive at the hub via SRT. Both get decoded and integrated into the same ATEM switcher. Both appear in the Red Button channel list.

The budget difference matters to the people producing it. It matters to the venue. It matters to the director who's cutting between them. But to the viewer? It's just content. Good content, too — because the phone cameras in the Harbour Tavern aren't worse, they're just different. Intimate. Guerilla. Real.

That's the core of the Bridlington Mesh right there: different budgets, different approaches, same destination. The technology connects them all.

Chapter 3: The Festival Concept

Let's take a step back.

We've established that Bridlington has the venue density to support something interesting. We've toured each space, sized up their character, their quirks, their potential. But here's the thing I haven't answered yet: what exactly is the event?

An IP broadcast network doesn't exist in a vacuum. It needs content. It needs a reason to exist beyond "wouldn't it be cool if." So before we dive into SRT buffer sizes and H.265 bitrates and the thousand other technical decisions that make up the rest of this series, we need to design the festival itself. The event. The thing that justifies the mesh.

This chapter is that design document.

Genre & Identity

The Bridlington Mesh isn't a single-genre festival. That would be wasted on seven completely different venues. Instead, it's a multi-venue arts and music festival — think Latitude meets Green Man meets a seaside town's collective decision to throw a really ambitious party.

Let me give it a name for the purposes of this series: The Bridlington Festival. Working title. If a better one comes up in the comments, we'll steal it.

The visual identity is coastal-modern — think deep blues and warm ambers, typography that nods to the town's Victorian signage but clean enough for a 2025 app interface. The logo incorporates the harbour, the Spa's dome and the Priory's Spire, because those are the three landmarks that define the town. It's local without being twee. Professional without being corporate.

The target audience is broad by design. The Royal Hall pulls in the headliner crowd — the people who'll pay £60+ for a Saturday night ticket. The Priory attracts the quieter audience — spoken word, acoustic, the kind of person who gets genuinely annoyed when someone crinkles a crisp packet during a performance. The Black Lion and Harbour Tavern are for the pub crowd — affordable, walk-in, no booking required. Sewerby Hall is for families — daytime, kids activities, no pressure to stay for a full set. South Beach is the wildcard — ephemeral, seasonal, the kind of thing you stumble across and tell your friends about.

The result is a festival that doesn't have a single identity, exactly. It has seven identities, overlapping and interleaving across a weekend. And that's the point.

The Seven Stages & Programming

Here's how the programming shakes out across the weekend.

Royal Hall — The Headliner Stage (Unlimited Tier)

The Royal Hall is the anchor. It runs from 1pm to 11pm across both days of the festival, building towards a headliner that closes the night. Think Glastonbury's Pyramid Stage on a seaside scale.

The programming structure is relentless: 45-minute sets with 15-minute changeovers, one act per hour, starting at 1pm. That's eight support/support-adjacent acts building through the afternoon and evening, each one a step up in energy and name recognition, capped by a two-hour headline set from 9pm to 11pm. Nine acts per day. Eighteen across the weekend.

The broadcast from the Royal Hall is the flagship. It's what appears on the main feed when the director isn't cutting to other venues. It's the channel that the casual viewer lands on by default, whether it's a local opener at 2pm or the headliner's finale at 11.

Spa Gardens — The Outdoor Stage (Prosumer Tier)

The Spa Gardens run during daylight hours — midday to dusk, roughly. This is the mid-size outdoor stage. The acts here are the ones who could headline a smaller venue but want the festival atmosphere of an outdoor crowd.

Programming leans towards upbeat, danceable, sunshine-friendly. Think indie, folk-rock, world music. The kind of bands that sound better when you can feel the sun on your face.

The real challenge here is the outdoor environment. Camera shading has to adapt to changing light. Wind noise has to be managed. And there's always the possibility that the whole thing gets rained off and everyone decants to the nearest pub.

The Gardens finish by early evening — the last act wraps before the Royal Hall's headliner starts. That gives the outdoor crowd time to drift indoors, grab a drink, and settle in for the main event. The overlap is intentional: the Gardens are the warm-up to the Hall's main course.

The Priory — Acoustic & Intimate (Professional Tier)

The Priory runs from 12pm to 8pm. Acoustic acts, spoken word, solo performers, small ensembles. The kind of programming that benefits from the Priory's natural reverb and contemplative atmosphere.

This is the "sit down and listen" venue. Capacity is limited — maybe 200 people — which means it'll sell out early for the bigger names. The programming schedule deliberately overlaps with the busier, louder venues, giving attendees a place to escape when they need a breather.

The broadcast setup is designed to capture the atmosphere without intruding on it, working with the room's acoustics rather than fighting them.

The Black Lion — Pub Rock (Low-Cost Tier)

The Black Lion runs from 12pm to 10pm. This is proper pub rock — loud, sweaty, up close. The kind of gig where the guitarist makes eye contact with you from three feet away.

Programming is indie, punk, blues, cover bands. The sort of acts that thrive in a small room with a sticky floor and a decent PA. No booking required — pay on the door, walk in, grab a pint, watch a band.

The broadcast runs all day. It's low-cost production that looks and sounds genuinely good.

Sewerby Hall — Daytime & Family (Budget Tier)

Sewerby Hall is the daytime venue. 10am to 5pm of constant music — folk, jazz, brass bands, world music, choirs. The kind of programming that works on a lawn with a picnic blanket and a cold drink.

The programming leans broad and accessible. A folk duo opens the morning, followed by a jazz brunch set, building through world music and brass bands into an afternoon finale that wraps before the evening events kick off elsewhere. It's family-friendly in the best sense — music that rewards attention but doesn't demand it.

The grounds are the venue, not the hall itself. Lawn seating, the zoo as a side attraction, and a steady stream of daytime festival-goers drifting between the stage and the refreshment tent. The Sewerby Hall feed is the "daytime vibes" channel — the one you put on in the background while you're making lunch.

Harbour Tavern — Roots & Intimate (No-Budget Tier)

The Harbour Tavern runs from early evening to late — 6pm to 11pm. Folk, roots, singer-songwriter, the kind of acts that thrive in a tiny room with a coal fire and a spirit of genuine enthusiasm.

This is the "I saw them in a pub before they got big" venue. Capacity is maybe 60 people. The atmosphere is unmatched.

The Harbour Tavern feed is the most honest broadcast in the entire mesh. No polish, no pretence. Just a band in a pub, captured in 4K, sent to the world.

South Beach — The Sunset Stage (Wildcard/OB)

South Beach is the ephemeral venue. It exists for one weekend (or one day, depending on weather and permissions) and then it's gone. A pop-up stage on the sand, facing the sunset.

Programming is sunset slots — 6pm to 9pm. Acoustic or low-amplified sets that work in the open air. The sound carries across the beach, mixing with the waves and the seagulls and the general ambient noise of a seaside town in summer.

The broadcast is pure cellular, no infrastructure, and a healthy dose of hope.

Capacity & Logistics

Let's talk numbers.

The Royal Hall holds around 8000 seated or 3,800 standing. The Spa Gardens can handle maybe 500 in the outdoor space. The Priory seats 200. The Black Lion has a capacity of perhaps 100 for gigs. Sewerby Hall's grounds can handle several thousand for daytime events. Harbour Tavern is 60 people max. South Beach, for a pop-up stage, can draw a crowd limited only by the tide and the number of ice cream vans.

The ticketing model is a hybrid. Weekend wristbands give access to all venues, with Royal Hall headline slots ticketed separately (or included at a premium tier). Day passes for people who can only make Saturday. Individual venue tickets for the pub gigs, bookable on the door.

Crowd flow is a genuine consideration. The geography means a steady stream of people moving between venues — from Sewerby Hall (daytime) down to the Spa (evening), with the pub venues absorbing the overflow. The bridge between the Old Town and the harbour is a bottleneck. The Spa Gardens act as a natural holding area between the Royal Hall and the beach.

Accessibility is manageable. The Royal Hall, Spa, Harbour Tavern, and Black Lion are all street-level or have step-free access. The Priory is the biggest challenge — it's an ancient building with limited accessibility. The festival should run a shuttle between Sewerby Hall and the town centre for people who can't manage the hill.

Schedule

Here's a sample Saturday running order. Each slot is a 45-minute set with 15 minutes for changeover:

Notice what this means. At 2pm, five venues are live simultaneously — the Royal Hall's emerging band, Spa Gardens' world music, the Priory's spoken word, the Black Lion's indie covers, and Sewerby Hall's acoustic set. At 7pm, the Royal Hall is building towards its headliner, the Black Lion has punk band going, the Harbour Tavern has a singer-songwriter, and South Beach has its sunset feature. The viewer at home can flick between a cinema-grade headline build-up, a sweaty pub rock gig, an intimate folk set, and a beach at sunset — all without leaving their sofa.

The overlapping sets are a feature, not a bug. The remote viewer can follow a single venue's full run or channel-surf between genres. The mesh makes that possible.

The Artist Experience

Let me talk about what this means for the bands.

For the Harbour Tavern, the artist experience is: turn up, plug in, play. The PA is the pub's existing setup. The green room is a corner of the bar. The broadcast is invisible — three phones on tripods, an OBS laptop in the corner, no visible production presence.

For the Royal Hall, the artist experience is: full hospitality. Dressing rooms. Catering. A production runner. The broadcast rig is obvious but discreet — cameras on pedestals, cables taped down, the whole thing managed by a crew who know how to stay out of the way.

The mesh enhances the performance in both cases. For the Harbour Tavern, it gives the artist a global audience they wouldn't otherwise have. For the Royal Hall, it gives the artist a broadcast-quality capture of their set that they can use for promotional material after the event.

The key principle: the broadcast should never intrude on the performance. The cameras are there to serve the art, not the other way around.

The Audience Experience — On Site

For the people who actually come to Bridlington, the festival experience is about movement and discovery.

Signage directs people between venues. Screening areas in the Spa complex and the Old Town show the multi-venue broadcast, encouraging people to wander. "There's a great acoustic set on at the Priory right now — two-minute walk that way."

Sewerby Hall is the daytime anchor for families. South Beach is the sunset destination. The Royal Hall is the evening centrepiece. The pub venues are the connective tissue — the places you go between the main events, where you discover a band you'd never heard of and end up staying for three hours.

The bridge between the Old Town and the Harbour becomes a thoroughfare. The Spa Gardens become a meeting point. The whole town becomes the festival site.

The Audience Experience — Remote

And for the person who can't make it to Bridlington?

They open an app or a website. They see seven options. They hear the master programme audio. They swipe between venues.

They experience the festival not as a single broadcast but as a living, breathing set of choices. They can follow a single band's full set. They can channel-surf between genres. They can drop into the Harbour Tavern for a song and then switch to the Royal Hall for the headline finale.

The remote audience isn't an afterthought. They're a core part of the festival's reach. The Bridlington Festival is for everyone, wherever they are.

Scope Notes

One question you might be asking: is this a one-off weekend, or is it bigger?

For the purposes of this series, the Bridlington Festival is a weekend event — Friday evening to Sunday evening, with Sewerby Hall operating daytime only on Saturday and Sunday. Two nights of headline programming, three days of daytime activity, with pub venues running throughout.

But the mesh itself isn't tied to a single weekend. Once the infrastructure is in place — the encoding hardware, the hub, the SRT links — it can be activated for any event in any venue combination. A single gig at the Black Lion that you want to broadcast. A wedding at Sewerby Hall. The Christmas show at The Spa.

The festival is the proof of concept. The mesh is the legacy.

Chapter 4: A Ladder, Not a Single Rung

Let me tell you about the problem.

Most broadcast production guides present a single "right way." Buy this camera. Buy this switcher. Buy this router. Here's the ATEM Television Studio 4K8 and four Studio Camera 4K Pros, now go make content.

There's nothing wrong with that advice, exactly. Those are good components. That setup works. But it assumes something that most people reading this blog don't have: an unlimited budget and a blank cheque from someone who doesn't ask questions.

The real world is messier. The real world is "I've got a church service to stream and the budget is whatever's left after the boiler repair." It's "I want to broadcast this pub gig and I've got three iPhones and a laptop." It's "I'd love to do multi-cam but I can't justify £50k on something that might not work."

And the standard advice just doesn't address that. It says "here's the pro way" as if any other way is somehow less valid. As if broadcasting from a pub with phone cameras is cute but not real.

I call bollocks to that too.

The Problem With Traditional Broadcast Thinking

The broadcast industry has a gatekeeping problem. It's not intentional — mostly it's just inertia. The people writing the guides and making the videos are professionals who work with professional budgets, and they write for their peers. But the side effect is a mindset that treats budget production as a compromise rather than a valid choice.

I've lost count of the number of times I've heard variations on:

• "You can't do proper live production without a vision mixer"
• "You need at least four SDI inputs to call it a multicam setup"
• "Phone cameras aren't broadcast cameras"

And yes, a phone camera isn't a broadcast camera. In the same way that a bicycle isn't a Ferrari. But both will get you from A to B, and the bicycle doesn't need a specialist mechanic and a fuel budget that makes your eyes water.

The problem with "right way" thinking is that it's a binary switch: you're either doing it properly or you're not. There's no middle ground. There's no recognition that "properly" depends entirely on your context — your budget, your venue, your audience, your goals.

That binary thinking is what stops people from starting. They look at the price of a URSA Cine and think "well, I can't afford that, so I guess I can't do broadcast." And that's a tragedy, because they absolutely can. Just not at that rung of the ladder.

The Alternative: A Production Spectrum

Here's the core philosophy of the Bridlington Mesh: it's a ladder, not a single rung.

Every rung is valid. Every rung serves a purpose. The choice depends on your budget, your venue, your desired quality, and the talent you have available. The rung you're on today doesn't define you — it's just where you are right now. Next year, with more experience and a bigger budget, you might climb a rung. Or you might find that the rung you're on serves your needs perfectly and you never need to climb.

The ladder looks like this:

• Rung 0: No Budget, Two Flavours — Zero pounds, phone cameras, free software. Two variants: local switching (Harbour Tavern) and direct-to-hub (South Beach).
• Rung 1: Budget — ~£8,000. The step up from "just making it work" to dedicated hardware.
• Rung 2: Low(ish) Cost — ~£26,000. The single biggest quality leap on the ladder.
• Rung 3: Professional — ~£56,000. A full broadcast workflow with proper crew infrastructure.
• Rung 4: Prosumer — ~£96,000. Outdoor-capable, daylight-tolerant, built for speed.
• Rung 5: Unlimited Budget — ~£815,000. The "tell them what it costs and they tell you when they want it" tier.

Seven rungs. Seven venues. Each one a different answer to the same question: "what can I do with this much money?"

The Seven Tiers

Let me introduce each tier properly. These are just introductions — each one gets its own dedicated post later in the series. But you need the overview before the deep dive.

Tier 0: No Budget — Harbour Tavern (£0)

This is the "what you already own" tier. The most democratic production model I know — your phone is your camera, free software is your switcher, and the internet is your distribution.

What this tier enables is genuinely remarkable: a fully switched multi-cam live broadcast from a pub, driven entirely from a laptop running free software, with no hardware expenditure whatsoever. The same laptop that's mixing the broadcast is also feeding the pub's in-house screens — the punters see exactly what the remote viewer sees. And because the local mix is handled at the venue, the hub only receives a single clean programme feed. The pub handles the pub; the hub handles the network. Beautiful division of labour.

The trade-off is reliability. You're betting ingenuity against infrastructure, and the house always wins eventually. Laptop thermal throttling during the headline set. A Windows update that restarts your streaming PC five minutes before go-live. WiFi congestion in a crowded room. The Harbour Tavern approach works — right up until it doesn't. And when it doesn't, you have no backup, because you spent nothing on redundancy. That's not a criticism. It's just the truth about this rung. Know the risk, accept the risk, enjoy the freedom.

Tier 0 (Mobile): No Budget — South Beach Pop-up (£0)

Same budget, opposite philosophy. South Beach proves that the mesh can absorb completely ad-hoc venues with zero notice and zero infrastructure.

Every phone is its own independent camera feed, transmitting directly to the hub with no local production layer in between. No laptop on the beach. No local switcher. No OBS instance to crash. The phones are the cameras, the phones are the encoders, the phones are the transmitters. The hub receives each feed as an individual source and mixes them into the broadcast alongside the Royal Hall's cinema-grade rig. The mesh doesn't care which camera is which — it's all just SRT streams arriving at the same decoders.

The trade-off here is the most extreme in the entire mesh. Four simultaneous 4K uploads over cellular is technically feasible but operationally terrifying. If the network congests during the sunset set — if too many tourists post their beach selfies at the same time — you lose a feed. Or two. Or all four. There's no backup because there's no budget for a backup. High reward, highest risk. But when it works, it's magic — a live broadcast from a beach, produced by nothing but phones and signal.

Tier 1: Budget — Sewerby Hall (~£8,000)

This is the first rung where you spend money — not much, but enough to buy yourself something invaluable: reliability.

Everything about this tier is about stabilising the weak points from Tier 0. The capture is still phones — same image quality ceiling, same sensor limitations — but the encode and transmission path is now handled by dedicated hardware that does one job and does it well. No laptop thermal throttling. No operating system deciding this is the perfect moment to install updates. Just a box in a rack that encodes video and sends it where it needs to go. You're not fighting your tools anymore; you're just using them.

The trade-off is that you haven't improved the image at all. The Sewerby Hall broadcast looks exactly as good as the Harbour Tavern broadcast — which is to say, surprisingly good for a phone, but still a phone. What you've bought is the confidence that your signal will reach the hub reliably, every time. If you've ever had a stream drop out during the climax of a set because your laptop fan gave up, you'll understand why £8,000 is a bargain.

Tier 2: Low(ish) Cost — The Black Lion (~£26,000)

This is the most important rung on the entire ladder. This is where the quality leap happens.

Everything below this tier uses phones for capture. Everything at this tier and above uses real cameras with proper sensors, interchangeable lenses, and actual dynamic range. The difference is not incremental — it's transformative. Go from phone cameras to proper cameras at this budget level and a casual viewer will not know they're watching a broadcast from a pub with a £26k production budget. It just looks like television.

The trade-off is that £26,000 is real money. It's a significant investment for a pub venue, for a community organisation, for anyone who isn't a broadcaster by trade. But here's the context that matters: this tier delivers roughly 90% of the professional result for roughly 3% of the top-tier budget. It is the sweet spot on the curve — the point where your money buys the most visible improvement per pound spent. If you're trying to decide where to start, start here.

Tier 3: Professional — The Priory (~£56,000)

This is the rung where production stops being a hustle and starts being a profession.

At this level, every camera has a dedicated operator. Every operator has intercom and tally. The director can talk to the camera ops without shouting across the room. The vision switcher has enough buttons that you need to label them. The audio setup is networked and controlled from a proper desk at front of house. It is, by any reasonable definition, a broadcast studio — just one that happens to be inside a medieval priory.

The trade-off is that you now need the crew to match the gear. The Priory's production level demands skilled operators — people who know how to frame a shot, ride gain on a Dante network, cut a live multi-cam feed without it looking like a Benny Hill chase scene. The gear is professional, and the people must be too. This isn't gatekeeping; it's just the reality of the rung. If you invest £56k in equipment and staff it with volunteers who've never touched a broadcast camera, you'll get results that look like they cost £56k — which is to say, disappointing.

Tier 4: Prosumer — The Spa Gardens (~£96,000)

This rung isn't about better pictures. It's about doing it outdoors.

The Spa Gardens present a completely different production challenge to every other venue. The light changes minute by minute as clouds roll in. The wind carries sound away from the microphones and introduces rumble that has to be filtered. The sun is in your eyes and the camera ops' eyes and the audience's eyes. And everything has to be rigged, sound-checked, and operational in a fraction of the time an indoor venue would allow, because outdoor events have tighter schedules and less tolerance for delay.

The budget at this tier buys you speed and resilience. Redundant power paths so you don't lose everything on a single trip. Daylight-capable camera chains that don't need a blacked-out room to look good. A workflow designed to handle a band finishing at 5pm and the next band sound-checking at 5:15. The viewer at home won't see a difference between this and the Priory. What they'll see is that the broadcast doesn't fail — even when the weather tries to make it fail.

Tier 5: Unlimited Budget — The Royal Hall (~£815,000)

And here we are. The top of the ladder.

What does £815,000 buy you? Not better pictures — not in any way the viewer at home will notice. The jump from the Priory to the Royal Hall is perhaps 5% improvement in image quality for 1,350% increase in cost. Diminishing returns doesn't even begin to describe it.

What it buys you is certainty. Total, absolute, unwavering certainty that the broadcast will not fail. Every signal path has a backup, and the backup has a backup. Every camera has built-in ND filters so you don't need matte boxes. Every lens has servo controls so you don't need a separate operator for zoom and pull. The network is built on SMPTE 2110 so any source can route to any destination without patching a single physical cable. The production team sleeps at night because the system doesn't.

The trade-off is the cost, obviously. But for a headline act playing to thousands of viewers, failure is not an option. And when failure is not an option, you pay whatever it costs to remove it from the equation. That's what this rung is for.

The Critical Insight

Now, the most important thing I'm going to say in this entire chapter:

Any kit can go in any venue.

The tiers I've just described map venues to budget levels, but that's a choice, not a rule. You could absolutely put a URSA Cine in the Harbour Tavern — and it would look incredible, and also be completely ridiculous, because you'd be trying to get cinema-grade footage out of a room with 8-foot ceilings and a single pendant light.

You could also broadcast the Royal Hall on phone cameras. It would work. The show would go out. But you'd be doing a disservice to the venue, the artist, and the audience — because the Royal Hall deserves the full treatment.

The venues are concrete examples that make the abstract tangible. They're not assignments. They're illustrations. The Harbour Tavern shows what's possible at £0. The Royal Hall shows what's possible at £815k. And everything in between shows you the choices you can make for your own context.

Your venue might not be the Harbour Tavern. Your budget might not be £0. But the principles are the same. You look at your room, your budget, your ambitions, and you pick the rung that fits.

Why This Matters

This philosophy transforms the series from "here's how to spend lots of money" to "here's how to make the right decision for your context."

If you're the AV volunteer at a church with a £2,000 budget, you're not reading the Royal Hall chapter and thinking "well, I guess I can't do this." You're reading it and thinking "interesting, but I'll be over in the Sewerby Hall chapter, thanks." And the Sewerby Hall chapter will actually be useful to you, because it's built on the same principles as the Royal Hall chapter, just with a different price tag.

That's the ladder. Every rung is valid. Every rung teaches you something that applies to every other rung. The knowledge is the same. Only the price tag changes.

A Note on Diminishing Returns

Let me be honest with you about the shape of this ladder.

The jump from Tier 0 (Harbour Tavern, £0) to Tier 1 (Sewerby Hall, £8,000) is enormous. You go from phone cameras and a laptop to dedicated encode/decode hardware and a proper ATEM switcher. The reliability improvement is night and day. The quality improvement is visible to even the casual viewer.

The jump from Tier 3 (Priory, £56k) to Tier 4 (Spa Gardens, £96k) is about half that improvement, for twice the money. The jump from Tier 4 to Tier 5 (Royal Hall, £815k) is barely perceptible to most viewers, for eight times the money.

Here's a rough sketch of the curve:

• £0 → £8k: Massive improvement. You bought reliability.
• £8k → £26k: Huge improvement. You bought real cameras.
• £26k → £56k: Significant improvement. You bought professional workflow.
• £56k → £96k: Moderate improvement. You bought outdoor capability and speed.
• £96k → £815k: Marginal improvement in picture, enormous improvement in workflow speed and peace of mind.

This isn't an argument against the Royal Hall setup. It's an argument for understanding what you're paying for at each rung. If you're spending £815k on a broadcast rig because you believe the picture will be fifteen times better than the £56k rig, you'll be disappointed. But if you're spending it because you need the reliability, the speed, and the confidence that comes with knowing your system won't fail during a live broadcast, you'll get exactly what you paid for.

Real-World Validation

I should probably mention that I've lived this ladder.

My experience with Beverley Folk Festival was solidly Tier 1 — a single camera, shoot the sets, edit overnight, get the video uploaded the next day. No livestream, just captured footage turned around fast enough to feel live-adjacent. I had plans to build a proper multi-cam livestream setup for future years — even had the kit list sketched out — but the festival was canned before I ever got the chance. That's the thing about this industry: sometimes the ladder gets pulled away before you can climb it.

I did run a weekly webcast for a while. That started with a proper ATEM setup — real switcher, real cameras, proper production workflow. It was small-scale but it was broadcast. When we took the show on the road, the whole rig was too much to haul, so we switched to mobiles. And that's where I learned the Tier 0 lessons the hard way — laptop thermal throttling during the live slot, a Windows update restarting the streaming PC five minutes before go-live, the full catastrophe. That experience is baked into every trade-off I describe in this chapter.

I've climbed a few rungs since then. Multicam experiments with proper cameras. Dante audio. A switcher that doesn't crash. Every rung taught me something about the rungs below it — which compromises are worth making, and which ones will come back to bite you. I may not have made it all the way to the top but I'm getting there slowly.

Chapter 5: Signal Flow — All Feeds Come In Over The Internet

The Big Picture

Let me describe something you should be able to sketch on a napkin after reading this chapter.

At every venue, cameras capture the action. Those feeds go into a local vision switcher (or software, or direct-to-internet — we'll get to the variants). The switcher produces a programme feed — a single video stream representing the best angle at any given moment. That programme feed passes through an encoder that converts it into an SRT stream and sends it over the public internet.

On the other end, at the Central Production Hub, a rack of decoders receives every venue's SRT stream simultaneously. All decoded feeds enter a master switcher. The master switcher produces multiple outputs: one main broadcast (switching between venues like a normal live show) and six individual venue feeds (the Red Button channels). Those outputs go through encoders and are distributed to streaming platforms, web players, and the viewer's screen.

Seven venues in. Eight streams out (one master, six venue-specific, with South Beach folded into the master mix). All connected by standard internet. No fibre runs between venues. No private 100G backbone. Just SRT over the same broadband connection you use to watch Netflix.

Here's the napkin:

Venue Cameras → Local Switcher → Encoder → [SRT over internet] → Hub Decoder → Master Switcher → Encoder → Viewer

That's it. That's the whole mesh, in one line. Everything else in this chapter is detail on what happens at each arrow.

The Core Principle

There is no dedicated fibre running between the seven venues. There is no private 100G backbone spanning Bridlington. There is no microwave link, no laser link, no private WAN.

Every venue-to-hub connection uses SRT — Secure Reliable Transport — over standard public internet. The same internet your phone uses. The same connection the pub uses for the fruit machine.

This is the key insight of the entire Bridlington Mesh: it works wherever there's a broadband connection. The hub doesn't need to be parked outside the Spa with a satellite dish. It doesn't need a fibre tap from the exchange. It just needs a decent internet connection — ideally 500 Mbps down, but we'll talk about that later — and it can sit anywhere.

The hub could be a van parked on South Marine Drive with a 5G router. It could be a server room at East Riding College with a 1Gb line. It could be a spare room in a house in the Old Town, or your mate's flat above the chip shop. The mobility is optional. The internet is the requirement.

Venue-Level Flow — Three Approaches

Every venue sends its programme feed to the hub. But not every venue sends it the same way. There are three distinct approaches, determined by what hardware the venue has and what it's capable of generating locally.

Approach 1: Streaming Encoder (Five Venues)

This covers the Royal Hall, Spa Gardens, Priory, Black Lion, and Sewerby Hall — every venue with a local ATEM switcher.

The flow looks like this:

Cameras → Local ATEM switcher → Streaming Encoder 4K → SRT over internet → Hub Streaming Decoder 4K

Each venue's ATEM produces a single programme feed — the director's cut, switching between cameras in real time. That programme feed passes through a Streaming Encoder 4K, which converts the SDI signal into an SRT stream and transmits it over the venue's internet connection.

The Streaming Encoder 4K is critical here. It's a dedicated hardware encoder that does exactly one thing — encode and transmit 4K video over IP — and does it reliably. No laptop, no software, no operating system to crash. It's a box in a rack that converts SDI to SRT and sends it into the internet. The signal arrives at the hub's decoder wall as a clean, stable feed.

This is the backbone of the mesh. Five of the seven venues use this exact flow. The same encoder model. The same SRT configuration. The same decoder on the receiving end. The cameras and switchers might differ wildly — from phone cameras at Sewerby Hall to cinema-grade rigs at the Royal Hall — but the transport layer is identical.

Approach 2: Camera App Direct (South Beach)

South Beach is the exception. There is no local switcher. There is no encoder. There is no local production hardware of any kind.

The flow looks like this:

Phone cameras → Blackmagic Camera App → SRT → Hub Streaming Decoder 4K (one per phone)

Each phone runs the Blackmagic Camera App, which encodes the phone's camera feed directly into an SRT stream and transmits it over cellular. No laptop in between. No OBS. No local production layer. Each phone is an independent camera feed, arriving at the hub as its own decoder input.

The hub receives four separate feeds from South Beach and mixes them into the master broadcast alongside the venue programme feeds. From the hub's perspective, there's no difference between a South Beach phone feed and a Royal Hall programme feed — they're all just SRT streams arriving at decoders.

The risk, of course, is cellular reliability. Four simultaneous 4K uploads over a mobile network is the most bandwidth-constrained link in the entire mesh. In practice, this might require bonded cellular (aggregating multiple SIMs for a single reliable connection), a temporary fixed-line drop, or reducing to 2-3 camera feeds depending on coverage. We'll dig into the options in the dedicated South Beach post.

Approach 3: OBS + SRT (Harbour Tavern)

The Harbour Tavern splits the difference. It uses phones like South Beach, but it adds a local production layer like the Streaming Encoder venues.

The flow looks like this:

Phone cameras → OBS (local mix + in-house screens) → SRT → Hub computer → full-screen display → SDI/HDMI capture → Hub ATEM

Three phone cameras connect wirelessly to a laptop running OBS. OBS handles the local multi-cam switching — cutting between angles, overlaying graphics, driving the pub's in-house screens. A single programme feed is encoded via SRT and sent to the hub.

At the hub, a standard computer receives the SRT stream, displays it full-screen on a monitor, and that monitor feed is captured via SDI or HDMI into the hub ATEM. It's a hack, but it's a reliable hack. The computer is doing one job — receiving and displaying a stream — and the capture card converts that display into a signal the ATEM can use.

The beauty of this approach is the division of labour. The Harbour Tavern handles its own switching and in-house display. The hub doesn't need to dedicate a decoder to the Tavern's feed; it just needs an SDI input from a capture card. The Tavern handles the Tavern, the hub handles the network.

Inside the Hub — The Decoder Wall

Let me take you inside the Central Production Hub and show you the rack.

The first thing you'll see is the decoder wall — sixteen Streaming Decoder 4Ks stacked in a rack, each one receiving an SRT stream and converting it back into SDI.

Here's how those sixteen decoders are allocated:

• 7 decoders — One per venue programme feed (Royal Hall, Spa Gardens, Priory, Black Lion, Sewerby Hall, Harbour Tavern, South Beach master)
• 4 decoders — Individual camera feeds from South Beach (one per phone, giving the hub director full control over which beach angle to use)
• 5 decoders — Backup and spares

That fifth backup category is important. These spare decoders are pre-configured and ready to receive. If a venue's ATEM fails during a broadcast, the venue can fall back to streaming individual cameras directly to the hub. Each camera becomes its own SRT source, arriving at its own decoder, and the hub director can cut between them manually. It's not as clean as a locally switched programme feed, but it's a failsafe that keeps the show on the air.

Each decoder's SDI output feeds into an SDI Expander 8X 12G, which converts the SDI signals into SMPTE 2110 IP streams for the master ATEM. All sixteen decoded feeds enter the hub's 2110 network through this conversion stage. The master switcher sees twenty-plus sources — sixteen decoder feeds plus local programme ins and auxiliary sources — and the director builds the broadcast from those.

Inside the Hub — The Encoder Wall (Red Button Output)

On the other side of the hub rack, seven Streaming Encoder 4Ks package the outputs for distribution. The path runs in reverse from the decoder side: the master ATEM sends its seven output streams over SMPTE 2110 to the same SDI Expander 8X 12G, which converts them back to SDI for the encoders.

The allocation:

• 1 encoder — The master mix. This is the main broadcast feed, switching between venues. It's what the casual viewer sees by default. The director's cut.
• 6 encoders — Individual venue feeds. Royal Hall, Spa Gardens, Priory, Black Lion, Sewerby Hall, and Harbour Tavern each get their own dedicated encoder, enabling the Red Button channel-flip experience. Lock onto any venue and watch their full set, uninterrupted.

South Beach does not get its own dedicated encoder. It's a pop-up venue — ephemeral by design — and its feeds are mixed within the hub workflow. The master mix includes South Beach when the director cuts to it, but there's no standalone South Beach channel. If you want to watch the beach, you watch the master feed until the director takes you there.

That's seven encoders producing seven simultaneous streams from a single hub. One master, six venue-specific. The viewer at home sees a channel list of seven options, each one an independent SRT stream originating from the same rack.

Distribution

From the encoders, the streams go to the world. The destination could be a custom web player with a channel selector built in. It could be a streaming platform like YouTube or Twitch, though those limit your channel-flip capability. It could be a dedicated app that presents the seven channels as a grid, letting the viewer swipe between them like they're flipping channels.

The exact distribution mechanism depends on the platform you're building for, but the principle is the same: seven SRT streams from the hub encoders, arriving at a distribution point that packages them for the viewer. Each stream is independent. Each stream carries its own programme audio. Each stream is selectable, switchable, and watchable in real time.

The viewer doesn't need to know or care that six of those streams come from venues with £0-£96k budgets and one comes from a venue that spent £815k. They just see seven channels labelled "Master Feed," "Royal Hall," "Spa Gardens," "Priory," "Black Lion," "Sewerby Hall," and "Harbour Tavern." The technology makes them indistinguishable.

The 100G & SMPTE 2110 Question

Let me address something that might be confusing if you've read other broadcast infrastructure guides.

100G networking and SMPTE 2110 exist inside the Bridlington Mesh. But they exist only inside the hub and inside the high-end venue racks. They are spectacularly, categorically not used for inter-venue transport.

The Royal Hall has SMPTE 2110 inside its own production rack, because its cameras and switcher are capable of it and the budget justifies it. The hub has a 100G-capable spine switch for routing between its decoders, switcher, and encoders at wire speed. But the connection between the Royal Hall and the hub is SRT over standard internet. The connection between every venue and the hub is SRT over standard internet.

The distinction matters. SMPTE 2110 is a beautiful standard for studio environments where you control every link in the chain. But it's not a WAN protocol. It doesn't handle packet loss gracefully. It doesn't adapt to changing bandwidth. It assumes a pristine network, and the public internet is not pristine.

SRT, on the other hand, was designed for exactly this use case: sending high-quality video over unpredictable networks. It has forward error correction. It has adaptive bitrate. It has ARQ (automatic repeat request) for retransmitting lost packets. It's built for the real world.

So the mesh uses SRT for the long haul and SMPTE 2110 for the final mile inside the hub. Heaven and earth. Public internet and pristine internal network. Each protocol doing what it was designed for.

Latency & Synchronisation

Here's where things get interesting.

Every SRT stream arriving at the hub has a different latency. The Harbour Tavern's OBS feed, coming from a laptop on a pub WiFi network, might have 500ms of end-to-end delay. The Royal Hall's Streaming Encoder feed, coming from a dedicated line with a properly configured SRT buffer, might have 2 seconds of delay. The South Beach phone feeds, coming over cellular, might vary between 1 and 5 seconds depending on signal conditions.

The hub has to reconcile these timing mismatches. When the director cuts from the Royal Hall (2s delay) to the Harbour Tavern (500ms delay), the audio and video from the two venues are not synchronised. A viewer who was watching the Royal Hall feed and switches to the Harbour Tavern will experience a sudden shift in timing.

The solution is buffering. The hub deliberately buffers every incoming feed to the highest common latency — typically 2-3 seconds. That means every venue is delayed to match the slowest feed. The Harbour Tavern's 500ms feed is delayed by an additional 1.5 seconds so it matches the Royal Hall's timing. The viewer experiences consistent latency across every channel switch.

The trade-off is that the entire broadcast is delayed by 2-3 seconds relative to real time. For a live music broadcast, this is acceptable. The viewer isn't watching the news; they're watching a festival. Nobody notices 3 seconds of latency on a guitar solo. But if you were doing a live phone-in or a competition, you'd need to account for it.

Within the hub, genlock keeps everything frame-accurate. The master ATEM generates a reference signal that every decoder and encoder locks to. The decoded SDI signals are reclocked to the hub's house sync. The switching happens on clean frames. The result is a broadcast that looks and feels like a single production, even though the sources are arriving from seven different internet connections in different states of delay.

Bandwidth Requirements

Let me give you the numbers. These are for 4K SRT streams, which is the standard across the entire mesh.

Per venue — upload required:

Most venues need 25-40 Mbps upload for a single 4K SRT stream. That's achievable on a decent business broadband connection, which most of these venues either have or could get. The Royal Hall gets a slightly higher allocation (35-50 Mbps) because the headline act deserves the extra headroom.

South Beach is the outlier. Four simultaneous 4K uploads over cellular at 20-30 Mbps each is a lot to ask of a mobile network. Total demand: 80-120 Mbps. A single 5G connection might handle it on a good day, but "on a good day" isn't a reliable broadcast strategy. Bonded cellular (aggregating multiple SIMs) is the likely solution, or a temporary fixed-line drop if the council can be persuaded.

Hub — download required:

The hub needs to receive eleven concurrent SRT streams — seven venue programme feeds plus four South Beach camera feeds — totalling 350-500 Mbps download. That's a serious connection, but not an impossible one. Gigabit broadband is available in Bridlington. East Riding College has a 1Gb line. A business connection at that speed costs money, but it's not astronomical.

And remember: 500 Mbps download means the hub can be anywhere that has that connection. A house in the Old Town with FTTP. A van with a 5G router. A mate's flat above the chip shop with a business line. As long as the pipe is big enough, the hub can live there.

Chapter 6: Protocol Primer — The Alphabet Soup

I need to talk about protocols. There's no way around it. The Bridlington Mesh runs on a collection of standards and acronyms — SRT, NDI, SMPTE 2110, Dante, NMOS, PTP — and if you're not familiar with them, they can look like a bowl of alphabet soup tipped over a technical manual.

I'm going to explain every one of them. Not in the dry, spec-sheet way. I'm going to tell you what each one does, why it's in the mesh, where it lives, and what happens if it stops working. By the end of this chapter, you should be able to look at any of these acronyms and know roughly what it does, where it sits in the stack, and whether you need to care about it for your particular rung of the ladder.

A quick note before we start: if you're already comfortable with broadcast networking, you can skim this chapter or skip straight to the glossary table at the end. I won't be offended. If you're new to this stuff — and many of you will be, because this series is for everyone on every rung — read on. I promise to keep it interesting.

SRT — Secure Reliable Transport

Let's start with the big one. The backbone of the entire mesh.

SRT is an open-source video transport protocol designed by Haivision in 2013 and open-sourced in 2017. It was built to solve a specific problem that every broadcaster eventually hits: how do you send high-quality video over the public internet without it looking like a corrupted mess?

Before SRT, sending video over the internet was a game of hope. You could use RTMP (Real-Time Messaging Protocol), which is what services like YouTube and Twitch use, but RTMP has no built-in error correction. If the network drops a packet, that packet is gone. The video frame it belonged to is corrupt. You see blocky artefacts, freezes, or — in the worst case — the entire stream disconnects and you're scrambling to reconnect while your viewers wonder what happened.

SRT fixes this with three key features:

Forward Error Correction (FEC). SRT sends each packet with redundant data that allows the receiver to reconstruct a certain number of lost packets without asking for them again. Think of it as sending a jigsaw puzzle with a few extra pieces that fit the same holes. As long as you don't lose too many pieces, you can still complete the picture without calling the sender.

Automatic Repeat Request (ARQ). When the receiver detects a lost packet that it can't reconstruct from the FEC data, it sends a request back to the sender: "resend packet #473, please." The sender re-transmits it. This adds latency — the packet has to travel to the receiver, the request has to travel back, and the replacement has to travel again — but it means the stream stays intact.

Adaptive Bitrate. SRT monitors the connection quality in real time. If it detects packet loss increasing, it can negotiate a lower bitrate with the encoder at the venue, reducing the demands on the network. When the connection improves, it negotiates back up. The broadcast doesn't drop; it just temporarily looks a little softer.

The trade-off for all this reliability is latency. SRT typically introduces 200 milliseconds to 2 seconds of delay, depending on your buffer settings and network conditions. That's fine for a festival broadcast. Nobody notices 2 seconds of delay on a guitar solo. But you wouldn't use SRT for a live two-way interview where timing needs to be frame-accurate at both ends.

SRT has three modes:

• Live Mode — Minimum latency, minimum buffering. Used when the network is stable and you want the lowest possible delay. Good for most venue-to-hub connections where the internet connection is decent.
• File Mode — Maximum reliability, maximum buffering. Used for file transfers where latency doesn't matter but completeness does. We don't use this in the mesh.
• Listener Mode — One end waits for the other to connect. This is how the hub's Streaming Decoders work — they listen for the venue's encoder to establish the SRT connection.

In the Bridlington Mesh, every single venue-to-hub transport connection uses SRT. Every venue produces a programme feed, encodes it into an SRT stream, and sends it over the public internet to the hub's decoder wall. The Royal Hall uses SRT. The Harbour Tavern uses SRT. South Beach uses SRT. The protocol is the same; only the hardware encoding it differs.

There's a fourth mode — Caller Mode — where the sender initiates the connection. The venue's Streaming Encoder acts as the caller, the hub's Streaming Decoder acts as the listener. This is the default configuration for most of the mesh: the venue reaches out to the hub and says "I have a stream for you," the hub says "send it," and the SRT link is established.

Real-world example: imagine a 4K feed from the Royal Hall, travelling over Bridlington's FTTP broadband, traversing the internet, and arriving at the hub's decoder wall. The SRT stream leaves the Royal Hall's Streaming Encoder at 35-50 Mbps. It passes through the venue's router, out to the ISP, across the internet, into the hub's connection, and lands at one of the sixteen Streaming Decoders. The decoder converts it back into SDI and feeds it into the master switcher. The total latency from camera to switcher is roughly 1-2 seconds. The director sees it on the multiviewer and cuts to it. The viewer sees a clean, stable picture.

That's SRT. Elegant, reliable, and absolutely critical to making this mesh work.

NDI — Network Device Interface

NDI is a different beast. Where SRT is a transport protocol (moving video from one place to another over the internet), NDI is a local-area discovery and routing protocol. It turns any device on your local network into a potential video source, without SDI cables, without dedicated video hardware, without anything except software and network ports.

Developed by NewTek (now part of Vizrt), NDI is widely used in live production environments where you want to pull a laptop screen, a phone camera, or a remote guest onto your switcher without running dedicated video cabling across the room. It's the duct tape of the modern broadcast world — not because it's a hack, but because it's astonishingly versatile.

In the Bridlington Mesh, NDI has exactly one job: it connects the phone cameras to OBS inside the Harbour Tavern.

Here's the flow: three phones running the NDI Camera app on the pub's local WiFi. The app converts each phone's camera feed into an NDI stream that appears on the local network as a discoverable source. OBS, running on a laptop connected to the same local network, sees those NDI sources and pulls them in as inputs. The director (who is probably also the bartender on a quiet night) cuts between them in OBS, adds overlays, and produces a programme feed.

Crucially, NDI stops at the pub's front door. The NDI streams from the phones never leave the Harbour Tavern's local network. Once OBS has the feeds, it switches to SRT for the long-distance hop to the hub. NDI is not a transport protocol; it's a local-area protocol. It doesn't have the error correction or adaptive bitrate that SRT provides, and it would be disastrous over the public internet.

NDI has some practical quirks worth knowing:

• Bandwidth — A single 4K NDI stream can consume 100-200 Mbps on your local network. Three phones simultaneously on pub WiFi is pushing the limits of consumer networking gear. In practice, you'd run the phones at 1080p NDI|HX (the compressed variant) to keep the local network from collapsing.
• Latency — NDI over WiFi introduces noticeable latency. Typically 2-5 frames for the encoder, another 2-5 for the decoder, plus WiFi jitter. The total is manageable for a pub broadcast but wouldn't work in a frame-accurate studio environment.
• Discovery — NDI uses mDNS (multicast DNS) to automatically discover sources on the local network. Plug in a phone, open the app, and it appears in OBS's source list. No IP addresses to type, no configuration. This is both a feature and a security concern in untrusted networks.

The pros are obvious: it costs nothing, it works with any device that runs the NDI app, and it eliminates the need for SDI cables in a venue where running cables would be impractical. The cons — bandwidth consumption on local WiFi, latency, and the fact that it doesn't work over the internet — define its role in the mesh.

Blackmagic Streaming Protocol

Blackmagic has its own take on SRT, and it's built into the Streaming Encoder 4K and Streaming Decoder 4K pair.

The Blackmagic Streaming Protocol is, at its core, a customised implementation of SRT with a simplified user interface. Where vanilla SRT requires you to configure IP addresses, ports, latency settings, stream IDs, and encryption keys on both ends, the Blackmagic version reduces the configuration to: "enter the decoder's IP address on the encoder, press connect."

That's it. The encoder handles the SRT negotiation, the encryption, the latency configuration, and the error correction automatically. The decoder receives the stream, converts it back to SDI, and outputs it. The whole encode/decode chain is a single button press on each end.

This is the key differentiator between the free tier (OBS with manual SRT configuration) and the budget tier (Streaming Encoder/Decoder pair with one-button operation). The underlying transport is SRT in both cases — same packet structure, same error correction, same adaptive bitrate. But the user experience is radically different.

For venues like Sewerby Hall and the Black Lion — where the production team might not have a dedicated network engineer — this simplicity is invaluable. You rack the encoder, plug in the SDI from your switcher, plug in the Ethernet from your router, enter one IP address, and press connect. The stream flows to the hub. The decoder at the hub does the reverse. The complexity of SRT is fully abstracted away.

For venues like the Royal Hall and Spa Gardens, where there's a dedicated engineering team, you might want full manual control over the SRT parameters — buffer sizes, latency settings, encryption modes. The Blackmagic Streaming Encoder allows manual override of these settings, so you can tune the stream to your specific network conditions. But the default "set and forget" mode is what makes it accessible to the lower tiers.

One thing to note: the Blackmagic Streaming Protocol isn't a separate transport protocol. It's SRT with a friendly face. The streams it produces are standard SRT streams that can be received by any SRT-compatible decoder, not just Blackmagic ones. But when you pair a Blackmagic encoder with a Blackmagic decoder, you get the seamless experience — automatic discovery if they're on the same network, automatic configuration, and monitoring status feedback.

SMPTE 2110

Now we enter the grown-up territory.

SMPTE 2110 is a suite of standards for transporting uncompressed video, audio, and ancillary data over IP networks. It's the broadcast industry's answer to the question: "how do we replace SDI with IP without sacrificing any of the determinism and reliability that SDI gives us?"

The answer is: carefully, expensively, and with a lot of standards.

SMPTE 2110 is divided into several parts:

• 2110-20 — Video. Carries uncompressed video streams (or lightly compressed, in some profiles) over RTP (Real-Time Transport Protocol) on UDP. No retransmission of lost packets — if the network drops a packet, that pixel is gone forever. This is why SMPTE 2110 requires pristine networks with zero packet loss.
• 2110-30 — Audio. Carries uncompressed audio streams, usually 24-bit/48kHz, synchronised with the video streams.
• 2110-40 — Ancillary Data. Carries timecode, closed captions, and other metadata alongside the video and audio streams.

The key difference between SRT and SMPTE 2110 is: SRT works on unreliable networks and makes them reliable through error correction. SMPTE 2110 assumes the network is already perfect and punts the reliability problem to the network engineers. If you have packet loss on a 2110 network, your video has artefacts, and there's no safety net.

SMPTE 2110 comes with SMPTE 2022-7, sometimes called "seamless protection." This standard allows you to send two identical copies of each stream down two completely separate network paths. If Path A loses a packet, the receiver seamlessly uses Path B's copy. You can lose an entire cable, an entire switch, an entire fibre run — and the broadcast continues without a glitch. This is the level of redundancy that professional broadcasters expect.

Inside the Bridlington Mesh, SMPTE 2110 lives in exactly two places:

1. Inside the Central Production Hub — The master ATEM communicates with the decoder wall, the encoder wall, and the audio suite using 2110 over a dedicated 100G-capable spine switch. Any source can be routed to any destination without patching a single cable. The 2110 network inside the hub is pristine, zero-packet-loss, professionally managed, and fully redundant with 2022-7.
2. Inside the Royal Hall and Spa Gardens venue racks — These venues have the budget and the engineering expertise to deploy 2110 within their own production rack. The cameras connect to the switcher over 2110, enabling high-channel-count uncompressed video with frame-accurate timing.

SRT connects venues to the hub. SMPTE 2110 connects devices within the hub and within the top-tier venues. Two different tools for two different jobs.

Dante / AES67 — The Audio Glue

Broadcast audio has been networked for longer than video has. AES3 digital audio over dedicated cables was the standard for decades, but it had a hard limit of two channels per cable. For a 32-channel setup, you needed sixteen cables. For a 64-channel setup, thirty-two cables. The cable management alone was a job description.

Dante changed that. Developed by Audinate, Dante is a networked audio protocol that runs over standard Ethernet. A single Cat6 cable can carry 64 channels of bidirectional audio. No analogue snakes. No multi-pair looms. No soldering 48-pin connectors at 2am. Just a cable, a switch, and a configuration app.

Dante uses PTP (Precision Time Protocol — more on that below) to synchronise all devices on the network to within microseconds. Every microphone, every stagebox, every audio console on the Dante network shares the same sample-accurate clock. You can route any input to any output from a software control panel, and the routing is persistent — you configure it once and it survives power cycles.

A Dante network has three components:

• Dante Transmitters — Devices that send audio onto the network. Microphones with Dante output, stageboxes (like the Yamaha Tio 1608-D2 or the Rio3224-D3), and console output cards.
• Dante Receivers — Devices that receive audio from the network. Amplifiers with Dante input, console input cards, and recording interfaces.
• Dante Controller — The software that manages routing. It discovers all Dante devices on the network and lets you patch any transmitter to any receiver with a drag-and-drop interface.

The "Dante Dream" — as I like to call it — is the ability to patch any microphone to any mix from anywhere in the venue. The front-of-house engineer controls the main mix. The monitor engineer controls the wedge mixes. The broadcast engineer pulls a separate mix for the streaming feed. All from the same network. All without moving a single cable.

In the Bridlington Mesh, Dante is used locally within each pro venue — the Black Lion's Yamaha Tio stagebox, the Priory's Rio1608-D3, the Royal Hall's Rio3224-D3. These handle the venue's local audio: microphones on stage, line inputs from instruments, and the mix that goes to the PA system.

AES67 is the interoperability bridge. It's an open standard that allows Dante networks to communicate with SMPTE 2110-30 audio streams. Inside the hub, the audio suite uses AES67 to bridge between the Dante network (from the venue audio setups) and the SMPTE 2110 network (from the hub's internal routing). The two audio standards speak the same language through AES67, allowing seamless integration.

NMOS — Networked Media Open Specifications

Imagine plugging a new device into your network and having every other device automatically know it exists, what it does, and how to connect to it.

That's NMOS.

NMOS is a suite of open standards developed by the Advanced Media Workflow Association (AMWA) for managing IP-based media devices on a network. It's designed to solve the "plug and pray" problem — the tedious process of manually configuring IP addresses, stream formats, and connection parameters for every device on an SMPTE 2110 network.

The two most relevant NMOS specifications for the mesh are:

• IS-04 — Discovery & Registration. Every NMOS-compatible device on the network registers itself with a central registry, announcing its existence, its capabilities (what formats it supports, what resolution, what frame rate), and its network address. Other devices can query the registry to discover available sources and destinations. Plug in a camera, and it appears in the registry automatically.
• IS-05 — Connection Management. Once devices have discovered each other through IS-04, IS-05 handles the connection negotiation. You tell the registry "I want camera 3 to connect to multiviewer input 5," and the registry tells camera 3 and the multiviewer to establish the connection. The streams flow without manual IP configuration.

NMOS is relevant primarily inside the hub and the high-end venue racks, where multiple IP-based devices need to find each other automatically. The Royal Hall's SMPTE 2110 network uses NMOS to manage its camera-to-switcher connections. The hub uses NMOS to manage its decoder-to-switcher and switcher-to-encoder connections.

If you're at the Harbour Tavern tier, you don't need NMOS. Your devices — phones, laptop, OBS — don't support it, and you don't have enough devices to need automatic discovery. NMOS is a professional networking convenience for environments where "thirty devices on the network, each with its own IP address" is Tuesday.

PTP — Precision Time Protocol

Time is the most important thing in broadcast that nobody outside broadcast thinks about.

When you cut from camera 2 to camera 3, the cut needs to happen on a specific video frame. Not between frames. Not on a partial frame. Exactly on frame boundary. If the timing is off by even one frame, the viewer sees a glitch — a flash of the wrong frame, a moment of black, a split-second of the switcher figuring out what it's supposed to do.

In an SDI-based broadcast system, timing is handled by a single reference signal called black burst or tri-level sync. Every device locks to this reference, and the timing is deterministic because every device is connected by dedicated cables. There's no ambiguity.

In an IP-based broadcast system, timing is handled by PTP — IEEE 1588 Precision Time Protocol.

PTP synchronises clocks across a network to sub-microsecond accuracy. A grandmaster clock (usually a dedicated device or a switch with PTP capability) broadcasts its time to every PTP-compatible device on the network. Each device adjusts its own clock to match the grandmaster, accounting for network latency. The result is that every camera, every decoder, every switcher on the network shares the same frame-accurate timebase.

PTP uses a master-slave hierarchy. The grandmaster is the highest authority. Boundary clocks (usually network switches) sit between the grandmaster and the end devices, re-timing the PTP messages to compensate for switch latency. Ordinary clocks (the end devices) receive the PTP messages and lock their local oscillators to the grandmaster.

Inside the hub, PTP keeps everything synchronised. The master ATEM generates the PTP grandmaster signal. Every Streaming Decoder receiving venue feeds locks to it. Every Streaming Encoder outputting Red Button channels locks to it. Every device on the SMPTE 2110 network locks to it. The switching happens on clean frames because every source shares the same timebase.

Here's the important limitation for the mesh: the Harbour Tavern and the Royal Hall cannot share a PTP domain. They're on different internet connections, potentially hundreds of milliseconds apart in network terms. PTP achieves sub-microsecond accuracy over a local network, but it cannot achieve that over the public internet. The latency and jitter of the WAN connection make it impossible.

Each venue runs its own local clock for internal timing. The hub receives their feeds and re-clocks them to the hub's PTP domain through the decoder wall. The decoders buffer a few frames, resync to the hub's reference, and output cleanly synced SDI. The timing differences between venues are absorbed by the decoder wall's buffering.

How They Fit Together

Let me map all of this onto the venue topology so you can see how the protocols stack.

Local (within venue):

Transport (venue to hub):

Hub internal:

The elegance of this is: every protocol handles what it's best at. NDI handles local phone discovery, because that's what NDI is designed for. SRT handles long-haul transport, because that's what SRT is designed for. SMPTE 2110 handles uncompressed routing inside the hub, because that's what 2110 is designed for. Dante handles audio networking, because it's the best at it. PTP handles sync within each timing domain.

The stack works because each protocol has clear boundaries. They don't compete. They complement.

Glossary Table

Here's a quick-reference table for the rest of the series. Bookmark this chapter if you need to — I'll be using these terms without explanation from now on.

That's the alphabet soup. Sorted, labelled, and mapped onto the mesh. You'll see these protocols referenced throughout the rest of the series, and now you know what each one does, why it's there, and where it belongs.

Chapter 7: The Central Production Hub — Command Nexus

Everything we've talked about so far — the venues, the cameras, the SRT streams, the decoder walls — it all converges in one place. A single room (or van, or college server closet) where all seven venue feeds arrive on a wall of decoders, get switched through a master ATEM, and emerge as the broadcast that reaches the viewer.

This is the Central Production Hub. The nerve centre of the Bridlington Mesh. And unlike a traditional OB truck, it doesn't need to be parked outside the venue with a satellite dish on the roof. It needs to be wherever a fast internet connection lives.

What Is a Central Production Hub?

Let me be precise about this.

A Central Production Hub is a centralised location where all venue feeds arrive, get switched, mixed, and distributed. It's the receiving end of every SRT stream, the home of the master switcher, the audio suite, and the encoder wall that packages the Red Button outputs. It's where the director sits. It's where the broadcast actually happens.

The key difference between this and a traditional OB truck is: the mesh hub doesn't need to be mobile. It needs to be wherever a strong internet connection is. The mobility is optional; the bandwidth is the requirement. You could put the hub in a van with a OneWeb Satelite slapped on top, and drive it to a different town every weekend. Or you could put it in a spare room and never move it. Both configurations work, because the venues connect to the hub over the internet, not over cables that run to a truck parked outside.

In a traditional broadcast model, the OB truck is the production centre. It contains the switcher, the audio desk, the replay servers, the transmission chain. It drives to the venue, connects to the venue's cameras via cables, and broadcasts from the truck's roof. The truck is mobile because the production needs to be at the venue.

In the mesh model, the production doesn't need to be at the venue. The venues send their feeds over the internet. The hub can be anywhere that has the bandwidth to receive them. The director can be in a different town. The audio mixer can be in a different room of the same building. The entire production team can be distributed, or they can share the same physical space. The mesh doesn't care.

Location Options

Let me walk through the four main options for where the hub lives. Each one is valid. Each one has different trade-offs.

Option 1: A Van / OB Truck

The traditional option. A dedicated vehicle with a production gallery, audio suite, and rack room built in. It's mobile, self-contained, and immediately identifiable as a broadcast facility.

The advantage is mobility. You can drive the hub to any location that has sufficient internet connectivity — a festival site, a different town, a different region. If the Bridlington Festival becomes the Scarborough Festival next year, the hub can follow.

The disadvantage is cost. A properly built OB truck with a production gallery, air conditioning, generator, satellite dish, and all the associated infrastructure can cost £200,000 to £500,000 for a small truck, and millions for a large one. Even a stripped-down van conversion with a rack, a desk, and a 5G router will set you back £20,000-£40,000 before you put any broadcast gear in it.

For the Bridlington Mesh, the van option is tempting but probably unnecessary. The mesh is designed to work from a fixed location. The van is a nice-to-have for future flexibility, not a requirement for the current plan.

Option 2: East Riding College

This is the grounded, realistic option. The one that makes the mesh feel achievable rather than aspirational.

East Riding College has a campus in Bridlington with a 1Gb internet connection, dedicated IT infrastructure, and physical space that could be repurposed as a production hub. A room becomes the gallery. Another room becomes the audio suite. A third room — or a rack cabinet in the server room — becomes the technical infrastructure.

The beauty of this option is it already exists. The internet connection is already in place. The power is already provisioned. The cooling is already running. All you need is the rack gear and the desks. The college provides the shell; you provide the broadcast equipment.

There's also an educational angle that I genuinely love. A production hub at East Riding College could be a teaching resource — a working broadcast facility that students can learn on, staffed by professionals during the festival and used as a training space the rest of the year. That's the kind of legacy that makes the mesh more than a technical exercise.

Option 3: A House / Spare Room

This is the ultimate budget option. The one that proves the mesh can start anywhere.

If you have 350-500 Mbps download, space for a 20U rack, and a tolerant household, you are the Central Production Hub. Your spare bedroom becomes the gallery. Your dining table becomes the audio suite. Your cupboard under the stairs becomes the rack room.

The cost of the physical space is zero — you already have it. The internet connection costs whatever your FTTP bill is. The power is whatever your household rate is. The cooling is whatever the central heating can manage.

This option proves the most important thing about the mesh: there's no barrier to entry beyond bandwidth. You don't need a broadcast facility. You don't need permission from an institution. You need a room, a fast internet connection, and the gear. If you have those three things, the hub exists.

Option 4: Dedicated Broadcast HQ

The long-term vision. A permanent facility in Bridlington with purpose-built production infrastructure — a proper gallery with a multiviewer wall, an acoustically treated audio suite, a climate-controlled rack room with redundant power and UPS backup, and dedicated office space for the production team.

This is the "if money were no object" option. It would cost hundreds of thousands of pounds to build and outfit. But it would be the most capable, most reliable, and most professional configuration of the hub.

Realistically, this is the destination after several successful festivals. Start in a spare room. Grow into the college. Eventually, if the festival is sustainable and the demand is there, build the permanent facility.

The Key Requirement

Across all four location options, one requirement dominates everything else: internet bandwidth.

The hub needs to download roughly 350-500 Mbps simultaneously — all seven venue programme feeds plus the four South Beach camera feeds arriving as SRT streams. It also needs to upload roughly 150-250 Mbps for the seven encoder outputs (the master mix plus six Red Button channels).

Everything else — cooling, power, rack space, desk space — is secondary to bandwidth. If you have a 500 Mbps connection and a cardboard box to put the gear on, you can make the hub work. If you have a world-class facility with a 50 Mbps connection, you cannot. The bandwidth is the constraint.

This is why the "spare room" option is so compelling. FTTP broadband in Bridlington can deliver 900 Mbps download. A spare bedroom with FTTP has more bandwidth than a dedicated OB truck with a satellite dish. The infrastructure is already in your house; you just need to use it.

The Three Areas

Metaphorically, the hub is divided into three functional areas. They might be three rooms, or three desks in the same room, or three positions in a van. The physical layout varies; the functions don't.

The Gallery — Vision Control

The gallery is where the director sits. It's the decision point for what the viewer sees.

The centrepiece is the multi-viewer wall — a single large monitor (or multiple monitors) showing every incoming feed simultaneously. All seven venue programme feeds. All four South Beach camera feeds. The master programme output. The six Red Button channel outputs. The director can see everything at once.

The master ATEM 4 M/E Constellation IP Plus sits in front of the director. The four M/E rows allow the director to manage the master mix on one row, preview individual venues on another, monitor the Red Button outputs on a third, and keep a clean feed on the fourth. The director's role is to choose which venue is live on the master mix at any given moment, switching between venues to create the broadcast that the casual viewer sees.

The gallery energy is specific. It's focused. It's the "this is where the buck stops" room. When the director cuts from the Royal Hall to the Harbour Tavern, the entire broadcast changes. The viewer at home sees a different room, a different band, a different atmosphere. That decision happens here.

The Audio Suite

The audio suite is where the sound is balanced, mixed, and managed.

The audio mixer sits at a Fairlight Live Audio Panel 40, connected directly to a Mac Studio which in turn is connected to the Master ATEM Via the 10G Network. All audio routing happens inside the ATEM's Fairlight engine — no external stage-box needed. The audio from every venue arrives embedded in the SDI feeds from the decoder wall, gets converted to 2110 alongside the video, and the Fairlight panel gives the audio mixer hands-on control over every channel.

The audio mixer's job is threefold:

1. Master mix — Balance the audio from whatever venue is currently live on the master feed. Audio follows video: when the director cuts from the Royal Hall to the Harbour Tavern, the audio follows automatically, with crossfade to smooth the transition.
2. Red Button mixes — Each of the six Red Button channels needs its own audio mix, independent of the master. A viewer watching the Harbour Tavern channel wants to hear the Harbour Tavern's PA mix, not the master feed's audio.
3. Comms — Manage the talkback and communications systems so the director can talk to the camera ops at any venue. The ATEM's internal comms system handles this — the audio suite is the telephone exchange of the mesh.

The audio suite works closely with the gallery. The director decides what to show; the audio mixer decides how it sounds. The two roles are separate but interdependent, communicating through a combination of talkback and experience.

The Rack Room

The rack room is where the boring critical stuff lives. No windows, no comfortable chairs, no creative energy. Just racks of gear doing their job.

Sixteen Streaming Decoder 4Ks receiving the incoming SRT streams from the venues and outputting SDI. An SDI Expander 8X 12G converting those SDI feeds into SMPTE 2110 IP for the master ATEM, and converting the ATEM's 2110 outputs back to SDI for the encoders. Seven Streaming Encoder 4Ks packaging the master feed and Red Button outputs. A 100G spine switch routing SMPTE 2110 between the SDI Expander, the master ATEM, and the rest of the hub. HyperDeck ISO Recorders capturing every feed for post-event archive. Cloud Store for network storage. UPS for backup power. A network switch that connects everything to the internet. Cable management that would make a data centre architect weep with joy.

The rack room is loud, hot, and full of blinking lights. It's also the room that makes the rest of the hub possible. Without the rack room, the gallery has nothing to show and the audio suite has nothing to mix.

Handling the Mix of Tiers at the Hub

Here's the unique challenge of the Bridlington Mesh: the hub doesn't receive uniform feeds.

The Royal Hall's programme feed arrives at 4K with cinema-grade depth and colour science. The Harbour Tavern's feed arrives at 4K from an OBS instance running on a pub laptop. The visual quality difference between them is enormous. And the hub has to normalise both into the same broadcast without making the transition jarring.

The director's tool for this is the edit itself. When you cut from the Royal Hall's cinema-grade URSA feed to the Harbour Tavern's phone camera feed, the viewer's brain adjusts automatically. The context shift — grand ballroom to intimate pub — is part of the storytelling. The visual quality difference is absorbed by the change of scene.

But there are practical techniques that help:

• Exposure matching — The hub ATEM allows per-input colour correction. The director can dial in gain, lift, and gamma adjustments to make the phone camera feeds more closely match the cinema feeds in overall brightness and contrast. It's not going to make a phone camera look like an URSA, but it stops the transition from feeling like a different planet.
• Audio bridging — A well-timed audio crossfade can smooth a jarring video cut. If the audio from the new venue comes in smoothly while the video is still showing the old venue (a brief "J-cut"), the viewer's ear leads the eye and the transition feels natural.
• Genre-appropriate expectations — The viewer knows that a pub broadcast looks different to a headline theatre broadcast. The Red Button channel labels set the expectation. Nobody watches the Harbour Tavern channel and complains that it doesn't look like the Royal Hall. The context explains the quality.

The mix of tiers is not a problem to be solved. It's a feature to be embraced. The mesh is about showing the full spectrum of production capability, and the hub is where that spectrum becomes visible.

The Decoder Wall & Encoder Wall Recap

I covered the specific allocations in Chapter 5 — seven venue decoders, four beach decoders, five spares; one master encoder, six venue encoders — so I won't re-list them here. What matters for this chapter is how they fit into the physical space.

The decoder wall is the first thing you see when you walk into the rack room. Sixteen black boxes, each with a small status screen showing which venue it's receiving, the SRT connection status, and the incoming bitrate. A green light means the stream is active and healthy. An amber light means the stream is connected but experiencing packet loss. A red light means the stream is down and the venue needs attention. Each decoder's SDI output snakes into the SDI Expander 8X 12G beside it, converting to 2110 for the IP network.

The encoder wall is next to it — seven black boxes, slightly different front panel, each showing the outgoing bitrate and the destination address. The SDI feeds into these encoders come from the same SDI Expander, converting the ATEM's 2110 outputs back to SDI. The master encoder's status screen cycles through "Master — LIVE" in a way that never gets old, even on the third day of the festival.

Between them, the SDI Expander and the 100G spine switch glow with the quiet confidence of devices that have never dropped a packet and never will. They're the unsung heroes. The decoders get the attention because they're where the feeds arrive. The encoders get the attention because they're where the broadcast leaves. The SDI Expander and spine switch sit in the middle, doing their jobs perfectly, demanding nothing but power and airflow.

The ATEM 4 M/E Constellation IP Plus — A Teaser

I'm going to give you a first look at the master switcher here, but we'll do the full deep dive in the hub's dedicated post.

The ATEM 4 M/E Constellation IP Plus is the heart of the command nexus. It's a 64-input, 64-output IP-based production switcher that sits at the centre of the hub's SMPTE 2110 network.

The "4 M/E" means it has four M/E (Mix/Effect) rows. In practical terms, this means the director can manage four separate mixes simultaneously:

• M/E 1 — The master broadcast feed. Switching between venues as the director cuts.
• M/E 2 — Preview and monitoring. The director can set up the next venue's feed before cutting to it.
• M/E 3 — Red Button oversight. Monitoring all six individual venue channels simultaneously.
• M/E 4 — Clean feed or playback. A spare row for whatever the director needs mid-show.

The switcher connects to the decoder and encoder walls entirely over IP — no SDI cables between the racks and the gallery. The 100G spine switch carries all the video, audio, and control data. The gallery has a control panel, a multiviewer output, and zero cable runs back to the rack room.

The built-in multiviewer shows every source on a single monitor (or multiple monitors if the director prefers). The director sees all incoming feeds, all outgoing feeds, and the status of every venue at a glance. If a feed drops, it's visible immediately. If a venue's encoder has a problem, the small status preview shows the alert.

The ATEM 4 M/E Constellation IP Plus is overkill for a single-venue broadcast. It's designed for multi-camera, multi-format, multi-destination productions where the switcher is the network. For the Bridlington Mesh, with seven venues and eight outputs, it's exactly the right tool.

The "Hub Can Be Anywhere" Philosophy

This is the liberating insight of the entire series, and I want to end this chapter on it.

The Bridlington Mesh does not need a £500,000 OB truck. It does not need a purpose-built broadcast facility. It needs a room (or a van, or a corner of a college server closet), a fast internet connection, and a rack of gear that costs a fraction of what you'd spend on a traditional mobile production unit.

The gear itself — the decoders, encoders, master switcher — costs roughly £136,000 at current retail. That's not pocket change, but spread across seven venues it works out at under £20,000 per venue for the aggregation layer alone. And you don't need to build it all at once. Add a Streaming Decoder and a Streaming Encoder as each new venue comes online — the hub grows with the mesh.

The hub is wherever you plug in. East Riding College could host it. A spare room could host it. A van with a OneWeb satellite dish could host it. The mesh was designed this way — not because mobility is the goal, but because removing the barrier to entry is the goal.

The venues send their feeds over the internet. The hub receives them over the internet. As long as the pipe is big enough, the hub lives anywhere.

Why Preview This Now

Every chapter so far has built toward this one. The Harbour Tavern's phone cameras sending into OBS. The Black Lion's compact production setup. The Priory's professional broadcast workflow. The Spa Gardens' outdoor resilience. The Royal Hall's cinema-grade spectacle. South Beach's cellular gamble. They all produce SRT streams. They all send those streams to the hub. They all converge in one room — or one van, or one college server closet — where the director, the audio mixer, and a wall of rack gear turn seven separate feeds into a single broadcast.

The hub is the "why" for the entire mesh. The venues are the inputs. The hub is where the output happens. Understanding the hub makes every other chapter make sense.

Chapter 8: The Green Reality

Let me be honest with you about something that most broadcast guides gloss over.

This mesh is power-hungry. Not "leave the lights on" power-hungry. "The landlord calls you at 2am because the breaker tripped" power-hungry. Seven venues, each with its own production setup, plus a central hub with racks of decoders, encoders, a 64-input ATEM, audio processing, and air conditioning to stop it all melting into a puddle of frustration — it adds up to a serious electrical load.

I'm not going to pretend this is environmentally friendly. It isn't. But I am going to lay out exactly what it costs in power terms, venue by venue, so you can make informed decisions about how to mitigate it. Because pretending power is free — or that the environmental cost doesn't matter — is dishonest. And I don't want to write that kind of series.

The Power Problem

Let's start with the obvious: a multi-venue broadcast is a power-hungry undertaking. Every camera needs power. Every switcher needs power. Every network switch needs power. Every lighting rig needs power. Every PA system needs power. Every laptop, every phone charger, every monitor, every decoder, every encoder — they all draw current, and they all add up.

For a single-venue production, the power draw is manageable. A pub gig with three phones and a laptop draws less than a kettle. A church service with two cameras and a streaming encoder draws about as much as a small office. You plug it into the existing venue power and you don't think about it.

For a seven-venue mesh with a central hub, the power draw is a line item in the budget. Not just the electricity cost — which is real — but the infrastructure required to deliver that power reliably. Clean power. Conditioned power. Backup power. Power that doesn't drop at the worst possible moment because the pub's kitchen just turned on the deep fat fryer.

Venue-Level Power — The Spectrum

The power draw across the seven venues spans a ridiculous range. Let me walk through it.

Harbour Tavern — Negligible

Three phone cameras charging overnight. A laptop running OBS. That's it. The total power draw for the Harbour Tavern's entire broadcast production is less than a single incandescent light bulb — which is fitting, because the pub probably still has a few of those.

From a green perspective, the Harbour Tavern is the ideal. Zero additional power infrastructure. Zero generator runtime. Zero air conditioning. The broadcast runs on the same electricity that's already powering the pub's fruit machine and the optics fridge. The environmental cost is effectively nothing.

South Beach — Minimal

Four phones, each running on battery for a three-hour sunset slot. No local power infrastructure at all. The environmental cost is whatever it takes to charge four phones before the set and whatever cellular tower energy is required to transmit the SRT streams.

South Beach is the cheapest venue to power because it doesn't have any power infrastructure to power. The phones are the cameras, the phones are the encoders, the phones are the transmitters. If they run out of battery, you swap to the other phones that were charging in the van.

Sewerby Hall — Low

A few phone cameras, a Streaming Decoder, a Streaming Encoder, and a small ATEM switcher. Total power draw is maybe 200-300 watts. The venue's existing power can handle it without breaking a sweat.

The green story at this tier is still good. The power draw is small enough that it can be offset by choosing efficient gear and being mindful of what's left on overnight. The Streaming Encoder and Decoder are both relatively low-power — around 30 watts each. The ATEM switcher draws maybe 90 watts. The phones charge from USB. The total carbon footprint is comparable to leaving a desktop computer running for a weekend.

The Black Lion — Moderate

Real cameras need real power. The Blackmagic Pocket Cinema Cameras draw about 30 watts each during operation. The ATEM switcher draws 90 watts. The Dante stage-box draws about 60 watts. Add the PA system — which the pub already has — and you're looking at roughly 500-800 watts for the broadcast setup alone.

The Black Lion's power draw is significant but not extreme. The venue can handle it through its existing circuits. The main consideration is running extension cables that don't create trip hazards across the pub floor.

The Priory — Moderate-High

Professional studio cameras draw more power than pocket cameras — about 60 watts each, plus viewfinders and tally lights. The ATEM Television Studio 4K8 draws around 90 watts. The Dante audio setup (Rio stagebox, CL5 desk) draws maybe 200-300 watts. Add lighting for the intimate performance space, and you're looking at 1.5-2 kW total.

The Priory's power draw is the first tier where you need to think about circuit loading. An older building like the Priory may have limited circuits, and the broadcast setup might need to be spread across multiple phases to avoid tripping breakers.

The Spa Gardens — High

Outdoor production is power-intensive for one simple reason: daylight. You need to light the stage to compete with the sun, and that takes real power. LED lighting helps — and we'd use LED — but even efficient fixtures draw significant current when you're fighting the afternoon sun.

The broadcast gear alone (Studio Camera 6K Pros, ATEM 4 M/E Constellation IP, 10G networking, audio suite) draws maybe 1.5-2 kW. The lighting rig adds another 5-10 kW depending on the size of the stage and the time of day. The PA system adds another 2-3 kW.

Total draw for the Spa Gardens: 8-15 kW. That's a dedicated generator or a serious tap into the Spa's mains supply.

The Royal Hall — Extreme

And here we are.

The Royal Hall's broadcast rig is the most power-hungry in the mesh. Four URSA Cine 12K LFs drawing 60-80 watts each. Fujinon box lenses with servo motors drawing additional power. The ATEM 4 M/E Constellation IP Plus at 200+ watts. The 100G networking infrastructure. The Yamaha CL5 audio desk. The Fairlight panel. The lighting rig — a proper theatre rig, not a few PAR cans on a T-bar. The PA system. The monitoring. The backline power for the band's own gear.

Total draw for the Royal Hall: potentially 50 amps or more of clean power. That's 12 kW on a 240V supply, just for the production infrastructure. The venue itself can handle it — a theatre of that size is built for this kind of load — but it needs dedicated circuits, conditioned power, and a generator backup plan.

The contrast between the Harbour Tavern (negligible) and the Royal Hall (50A+) is the entire green discussion in microcosm. The same broadcast, the same mesh, the same viewer experience on one level — but the power cost differs by four orders of magnitude.

The Hub's Appetite

The hub itself is a power consumer that deserves its own section.

Sixteen Streaming Decoder 4Ks at roughly 30 watts each: 480 watts. Seven Streaming Encoder 4Ks at roughly 30 watts each: 210 watts. The SDI Expander / IP converters: roughly 100 watts. The ATEM 4 M/E Constellation IP Plus: roughly 200-300 watts. The 100G spine switch: 200-400 watts depending on configuration. The HyperDeck recorders: 60 watts each if all running. The audio suite gear. The monitoring displays. The network switches.

Total hub power draw: roughly 2-3 kW for the rack gear alone.

Then add the air conditioning. A rack room full of gear generating 2-3 kW of heat needs active cooling, especially if the hub is running continuously across a festival weekend. A portable AC unit drawing 1-2 kW is the minimum. A proper in-room cooling system draws 2-5 kW depending on the size of the space and the ambient temperature.

Total hub power with cooling: potentially 5-10 kW. If the hub is in a van with a diesel generator, that's a lot of fuel. If the hub is at East Riding College, it's on the grid — still a significant draw that needs budgeting for, but cleaner.

Battery Storage & Power Smoothing

Here's something I've learned from practical experience: broadcast gear doesn't like dirty power. It doesn't like the voltage sags that happen when a PA system kicks in. It doesn't like the frequency drift that happens when a generator is under light load. It wants clean, stable, conditioned sine-wave power.

This is where battery buffers make sense.

A Tesla Powerwall or similar battery storage system costs roughly £8,000 installed. That's not cheap. But it provides several benefits that matter for broadcast:

• Clean power output. The battery's inverter produces a stable sine wave regardless of what's happening on the input side. If the generator surges, the battery smooths it. If the mains voltage dips, the battery holds steady.
• Peak smoothing. Broadcast gear doesn't draw constant power — it draws peaks when motors start, when switchers change state, when amps hit a transient. The battery absorbs those peaks, reducing the load on the generator or mains supply.
• Generator runtime reduction. If the hub is on a generator, the battery allows the generator to run at a steady efficient load (charging the battery) rather than varying wildly to match the gear's draw. This reduces fuel consumption by 20-30% in practice.
• UPS function. If the mains power drops or the generator stalls, the battery keeps the gear running for hours, not minutes. A UPS (uninterruptible power supply) buys you 10-15 minutes to shut down gracefully. A Powerwall buys you enough time to finish the set or switch to a backup generator.

For the hub, a battery buffer is worth the investment. For the Royal Hall, where clean power is critical for the cinema-grade cameras, it's almost essential. For the Harbour Tavern and South Beach, it's overkill — the power draw is too low to justify the cost.

Bio-Fuel & Green Alternatives

If the hub runs on a generator — whether it's in a van or at a location without reliable mains power — the fuel choice matters.

Diesel is the default but the worst option. High CO₂ emissions, particulate matter, noise. A diesel generator running for a weekend will produce roughly 200-400 kg of CO₂ depending on load. That's the equivalent of driving 800-1,600 miles in a family car.

HVO (Hydrotreated Vegetable Oil) is a drop-in replacement for diesel that reduces CO₂ emissions by up to 90%. It's made from waste cooking oils and vegetable fats. It works in standard diesel generators without modification. The downside is cost — HVO is roughly 30-50% more expensive than diesel per litre. For a festival weekend, the additional cost might be £200-£400. That's a small premium for a significant reduction in environmental impact.

Solar is a nice idea but impractical for the hub's power draw. A 5 kW solar array (roughly 15-20 panels) would generate enough power for the hub on a sunny day, but "on a sunny day" isn't a reliable broadcast strategy. Solar could make sense for low-power venues like the Harbour Tavern — a couple of panels charging phone batteries and a laptop is entirely feasible.

The honest answer is: for the hub and the high-end venues, HVO fuel is the most practical green alternative right now. Solar is a supplement, not a solution. And battery storage is the best investment you can make for both power quality and environmental impact.

The "Eco-Reality" Check

I want to be clear about something. Every post in this series will include a section on the environmental and power cost of that tier. It won't be a token gesture — it will be a specific breakdown of what that venue's production consumes, what it emits, and what you can do to reduce both.

I'm doing this because omitting it would be dishonest. A full SMPTE 2110 mesh with seven venues and a central hub is not environmentally friendly. Pretending otherwise — or worse, ignoring the question entirely — is the kind of thing that gives technical blogs a bad name.

But I also want to be realistic. The environmental cost of a festival weekend's broadcast is tiny compared to the environmental cost of the festival itself — the travel, the catering, the infrastructure, the thousands of people driving to Bridlington and back. The broadcast is a rounding error on the festival's total carbon footprint.

That's not an excuse. It's context. We should still mitigate where we can. But we shouldn't pretend that the broadcast is the problem.

The Honest Conclusion

Here's the truth: a full SMPTE 2110 mesh with an OB truck is not environmentally friendly. The Royal Hall alone draws more power than an average household uses in a week. The hub with cooling draws more than the Royal Hall. The total for the weekend is significant.

But being aware of the cost and mitigating it — Powerwalls, HVO generators, efficient gear choices, thoughtful scheduling — is better than ignoring it. This is about responsibility, not perfection. The Harbour Tavern will never draw significant power. The Royal Hall will always draw significant power. The gap between them is the gap between a phone camera and a cinema-grade broadcast rig. They're different tools for different jobs, and their power consumption reflects that.

The most important thing you can do is be aware. Know what your gear draws. Know where your power comes from. Know what the alternatives are. And make conscious choices — not default ones.

Chapter 9: A Note on Budgets — £0 to £815k

Let me address the elephant in the room. The one that's been standing in the corner since Chapter 1, shuffling its feet awkwardly every time I mention another piece of expensive gear.

This is expensive. Ridiculously expensive. Full-stop-I-should-sit-down-before-I-look-at-this-spreadsheet expensive.

But here's the thing I've been building toward across eight chapters: it doesn't have to be. Not for you. Not for your context. The full mesh — all seven venues, the hub, the whole glorious fever dream — costs roughly £1.1 million. But the Harbour Tavern costs £0. Sewerby Hall costs £8,000. And both produce a broadcast that's part of the same network.

Let me lay out the numbers honestly.

The Total: ~£1.1m-ish for Everything

Here's the rough breakdown of the entire Bridlington Mesh, venue by venue:

That's a million pounds. Let's not pretend that's a normal amount of money to spend on anything that isn't a house or a small yacht. I'm not going to tell you "well, actually, broadcast gear is expensive." You know that. You've lived it. What I am going to tell you is what that million pounds buys you, and — more importantly — what it doesn't.

It buys you certainty. At the top end, every signal path has a backup, and the backup has a backup. The cameras have servo-controlled box lenses so you don't need a separate operator for zoom and focus pull. The network is built on SMPTE 2110 so any source can route to any destination without patching a cable. The audio is networked, the switching is IP-based, and the whole system is designed for a crew who know what they're doing and need the tools to match.

But it doesn't buy you a different broadcast. The Harbour Tavern's phone cameras produce the same 4K SRT stream that arrives at the same hub and gets switched on the same ATEM as the Royal Hall's cinema-grade rig. The million-pound rig and the zero-pound rig coexist in the same viewing experience. The viewer doesn't know which is which. The mesh doesn't care.

But Also: £0 — Or £6,000 — Or £26,000

The Harbour Tavern costs nothing. Zero pounds for the entire broadcast production chain, because the phones are already in people's pockets, the laptop is already behind the bar for the music quiz, and OBS is free software. It works. It's not as reliable as a dedicated encoder, but it works.

Sewerby Hall costs £8,000. That's not nothing — it's a decent second-hand car — but in broadcast terms it's pocket change. A single lens on the Royal Hall's main camera costs more than Sewerby Hall's entire setup.

The Black Lion costs £26,000. That's serious money for a pub, a charity, a small venue. But it buys you the single biggest quality leap on the entire ladder — the jump from phone cameras to proper interchangeable-lens cameras with real dynamic range. It's the sweet spot.

The point is: you don't need to spend the million. You don't even need to spend the £26k. You can start at zero and climb the ladder at whatever pace your budget allows. Every rung is valid. Every rung produces a broadcast that's part of the same mesh.

The Spectrum in Between

Here's a more detailed look at what each tier costs and what it buys you:

Every venue on that table produces a broadcast. Every venue feeds into the same hub. Every venue appears on the Red Button channel list. The only difference is what it cost to get there.

Only you can decide what "good enough" means for your context. If you're a pub with zero budget, the Harbour Tavern approach is good enough. If you're a heritage venue wanting professional results without a professional budget, Sewerby Hall's model might fit. If you're producing a headline act for thousands of viewers, the Royal Hall's rig starts to look like a necessity rather than an indulgence.

There is no wrong answer. There is only the rung that fits your context.

Digital Sovereignty Rant — ☕

Right. I've been holding this in for seven chapters. Time to let it out.

Every time I see another production company lock themselves into a cloud-based subscription model for something they could own outright, I want to sit them down and show them the spreadsheet. Because the maths is devastating.

Consider a cloud-based video routing and switching service. Perhaps you're using a live production platform that handles your multi-camera switching, your graphics, your replay, your distribution — all running on someone else's servers. It costs, say, £50,000 per year. Maybe more. Maybe less. The exact number doesn't matter; the shape of the curve does.

After three years, that's £150,000 in operating expenditure. You own nothing. The platform could change its pricing. It could change its features. It could go out of business. You have no recourse, because you don't own the infrastructure. You're renting capacity on someone else's computer.

After ten years, that's £500,000. Half a million pounds. You own nothing.

For that same £500,000, you could buy an ATEM 4 M/E Constellation IP Plus outright. You could buy sixteen Streaming Decoder 4Ks and seven Streaming Encoder 4Ks. You could build a 100G-capable internal network. You could rack it, wire it, configure it, and own it.

And in ten years? That ATEM switcher will still be working. It will still be switching video. It might not have the latest HDMI standard, but it will still do its job. You can resell it. You can repurpose it. You can donate it to a school. It has value.

The ATEM I bought three years ago is still worth roughly what I paid for it. The cloud subscription I cancelled two years ago is... nothing. No residual value. No asset. Just a monthly direct debit that stopped leaving my account.

This isn't about being anti-cloud. The cloud is great for burst capacity, for distribution, for experiments. But making the cloud your production infrastructure — the thing you rely on to put a show on air — is trading long-term ownership for short-term convenience. And the convenience is not worth the loss of sovereignty.

The Bridlington Mesh, by contrast, is built on gear you can buy, rack, cable, configure, and own. The SRT standard is open. The SMPTE 2110 standard is open. The gear you buy from Blackmagic, Yamaha, and everyone else is yours to configure, maintain, and repurpose however you want. Nobody can change your pricing. Nobody can deprecate your feature set. Nobody can turn off your server.

You own your broadcast. That matters.

Depreciation & ROI

Let me do the maths properly.

An ATEM 4 M/E Constellation IP Plus costs £10,445. That's the retail price at time of writing. This switcher has a useful life of at least ten years in a professional environment — probably longer if you look after it and don't need the latest HDMI standard.

That works out at £1,044.50 per year in depreciation. Less than £100 per month.

A single Streaming Decoder 4K costs roughly £1,215. Expected useful life: similar. That's £121.50 per year.

A Yamaha CL5 audio desk costs roughly £15,000. That's £1,500 per year over ten years.

Compare this to paying £50,000 per year for a cloud production platform. The cloud platform costs 50x the ATEM switcher per year, and after that year you own nothing. The ATEM costs £10k once and still works in year ten.

Capital expenditure is not a dirty word. It's owning your tools. It's having an asset that holds value. It's not being at the mercy of someone else's pricing decisions.

The mesh is capital-intensive upfront. I won't pretend otherwise. But over the lifetime of the equipment, the costs are dramatically lower than any subscription model, and you own everything at the end.

The "Start Small" Challenge

Here's my challenge to you, if you've read this far and you're thinking "I want to build something like this."

Start at a pub.

Pick a venue like the Harbour Tavern. Three phones, a laptop, OBS. Stream a gig. See what works and what doesn't. Experience the terror of a Windows update happening five minutes before go-live. Learn what SRT feels like in practice, not just in theory.

Then add a Streaming Decoder and Encoder when the OBS setup starts feeling fragile. Now you have a reliable encode/decode chain.

Then add a proper camera when the phone image quality starts bothering you. Now you're at the Black Lion tier.

Then add a second venue. Suddenly you need the hub. So you build it — one decoder, one encoder, a software switcher to start.

The mesh grows with you. The infrastructure is modular. Every piece you add works with every piece you already have. The SRT protocol doesn't care whether it's encoding from OBS or a Streaming Encoder 4K. The hub doesn't care whether it's receiving a phone feed from South Beach or a cinema-grade feed from the Royal Hall.

That's the beauty of this approach. The ladder is real. Climb it at your own pace.

Chapter 10: Glossary

This glossary is your reference companion for the entire Bridlington Mesh series. Every technical term, piece of gear, protocol, and concept is defined here in plain English, with context on how it fits into the mesh and which venues and tiers it applies to.

In future posts, terms marked with an asterisk* on first use will be defined here.

A

ATEM* — Blackmagic Design's line of production vision mixers (video switchers). From the £300 ATEM Mini Pro to the £10k+ ATEM 4 M/E Constellation IP Plus.

ATEM switchers come in dozens of configurations — some standalone with built-in control panels, some rack-mounted with separate control surfaces. They handle video switching (cutting between cameras), keying (overlaying graphics), and audio mixing (built-in Fairlight engine). The ATEM Mini Pro range uses HDMI inputs. The Constellation range uses SDI (and in the IP Plus models, SMPTE 2110 over 100G). All ATEMs share the same core software interface, so skills transfer up the range. The mesh uses ATEMs from the ATEM Mini Pro (Sewerby Hall) through the ATEM 1 M/E Constellation 4K (Black Lion), ATEM Television Studio 4K8 (Priory), ATEM 4 M/E Constellation IP (Spa Gardens) to the ATEM 4 M/E Constellation IP Plus (Royal Hall and hub).

Tier/Venue Relevance: All tiers from Sewerby Hall upwards. Harbour Tavern and South Beach use software switching (OBS, phone apps) instead.

ATEM 4 M/E Constellation IP Plus* — The flagship ATEM switcher. 64 inputs, 64 outputs, 16 x 100G QSFP28 network ports, 132-channel Fairlight audio mixer, built-in talkback. The master switcher for the Royal Hall and the Central Production Hub.

This is the high end of the consumer-to-cinema ladder. It switches up to 64 uncompressed 4K sources in SMPTE 2110 format, with built-in NMOS control for dynamic routing, PTP for frame-accurate sync, and SMPTE 2022-7 for seamless protection switching. It connects entirely over IP — no SDI cables in the rack room. The SDI Expander 8X 12G bridges any legacy SDI devices (decoders, encoders) into the 2110 IP domain. The Fairlight engine handles 132 channels of audio with full dynamics processing on every channel. The built-in talkback system provides intercom between director and camera ops without an external comms system.

Tier/Venue Relevance: Royal Hall (Tier 6 — Unlimited) and Central Production Hub. Not used in any other venue.

ATEM Mini Pro* — Blackmagic Design's entry-level HDMI switcher. Four HDMI inputs, one HDMI output, USB-C webcam output. ~£300.

The ATEM Mini Pro is where many broadcast journeys begin. It takes four HDMI sources (phones, laptops, cameras without SDI outputs) and switches them into a single programme output. The Pro model adds streaming and recording to USB. In the mesh, it's used at Sewerby Hall for local switching before encoding to the hub, and potentially as a local sub-switcher at Harbour Tavern if more than one phone camera is needed.

Tier/Venue Relevance: Sewerby Hall (Tier 3 — Budget), Harbour Tavern (Tier 1 — No Budget). Not used in tier 4+ venues.

B

Blackmagic Camera App* — Free mobile app that turns an iPhone into a broadcast-quality camera. Connects to ATEM switchers wirelessly. Used at South Beach.

The Camera App provides manual exposure control, focus peaking, zebra stripes, frame guides, and direct streaming to ATEM switchers over the local network. In South Beach's case, it streams directly to the hub over cellular data using SRT encapsulated in the app's streaming protocol. The phone's cellular connection replaces the need for any dedicated network infrastructure at the beach. The app is free on the iOS App Store, making it one of the most cost-effective broadcast tools in existence.

Tier/Venue Relevance: South Beach (Tier 2 — No Budget Mobile). Potentially any tier as a backup or B-roll source.

Blackmagic Pocket Cinema Camera 4K* (BMPCC 4K) — Blackmagic's compact cinema camera with a Four Thirds sensor, 13 stops of dynamic range, and dual native ISO. ~£1,300.

The BMPCC 4K is the camera that democratised cinema quality. It shoots true 4K DCI with Blackmagic Raw or ProRes, records to standard SD cards, and has a full-size HDMI output plus USB-C. In the mesh, it's the primary camera for The Black Lion — a significant jump in quality from phone cameras at the Harbour Tavern and South Beach. The BMPCC 4K/Pocket 6K/6K Pro family represents the most popular rung of the camera ladder for indie creators, with thousands in active use worldwide.

Tier/Venue Relevance: Black Lion (Tier 4 — Low/Medium Cost). Also used as a mobile B-camera at Priory and Spa Gardens.

Blackmagic Studio Camera 4K Pro* — Blackmagic's dedicated studio camera with built-in viewfinder, talkback, tally, and SDI connections. ~£1,700.

Unlike cinema cameras (which are designed for single-operator use with an external monitor and follow-focus), studio cameras are designed for a team. They have a built-in 7-inch viewfinder, a PL/EF lens mount with servo zoom control, a built-in talkback system for director communication, and a tally light that shows red when the camera is live. The Studio Camera connects to an ATEM switcher over SDI with a single cable carrying video, audio, talkback, tally, and camera control. In the mesh, the Studio Camera is used at The Priory as the primary camera, paired with a VariCam zoom lens for flexible shot composition.

Tier/Venue Relevance: Priory (Tier 5 — Professional).

Blackmagic Streaming Encoder 4K / Streaming Decoder 4K — Paired hardware that encodes video to SRT at the venue (Encoder) and receives it at the hub (Decoder). The plug-and-play backbone of the pro venue transport chain.

The Streaming Encoder 4K takes an SDI or HDMI video source, encodes it to H.265 with SRT transport, and sends it over the internet to a Streaming Decoder 4K at the hub. The Decoder receives the SRT stream and outputs SDI or HDMI for the local switcher. The pairing is configured via Blackmagic Cloud — you link an Encoder to a Decoder in the cloud setup tool, and they find each other automatically. The mesh requires 7 Encoders (one per venue) and 16 Decoders at the hub (7 venue feeds + 4 beach cameras + 5 backup).

Tier/Venue Relevance: All venues from Sewerby Hall upwards. Essential for every venue-to-hub connection using SRT as transport.

C

Central Production Hub* — The single location where all venue feeds arrive and are switched into a master broadcast. Could be a van, a college building, a house, or a dedicated facility.

The hub is the command nexus of the mesh. It receives SRT streams from all seven venues via decoder hardware, routes them through an ATEM switcher for switching and audio mixing, and outputs the master programme plus five Red Button feeds. The hub requires approximately 350-500 Mbps download bandwidth to handle 11 concurrent 4K SRT streams (7 venue + 4 beach). Its internal network runs on SMPTE 2110 over 100G Ethernet, with SDI Expander bridges connecting the decoder/encoder SDI world to the switcher's IP domain. The hub is described in detail in Chapter 7 and will be the subject of Post 5 of the series.

Tier/Venue Relevance: The hub is venue-agnostic — it serves every venue equally. Hub infrastructure cost (~£136k) distributes across all venues.

Cloud Store / Cloud Store Ultra — Blackmagic's network-attached storage for video production. Used for recording and sharing media across the mesh.

The Cloud Store is a shared storage device that connects to the network via 10G Ethernet. Multiple computers can record to it, edit from it, and play back from it simultaneously. In the mesh, the Cloud Store Ultra 48TB at the hub records the master programme feed and all five Red Button feeds simultaneously, providing instant access for post-production. HyperDeck ISO recorders also record individual camera ISO feeds to the Cloud Store, allowing multi-camera editing without separate ingest.

Tier/Venue Relevance: Central Production Hub primarily. Smaller Cloud Store units could be used at Royal Hall or Spa Gardens for local recording.

D

Dante* — Audinate's networked audio protocol. Sends up to 512 channels of uncompressed audio over standard Ethernet. Used across the prosumer and professional venue tiers.

Dante replaces the thick multi-core audio cables ("snakes") that traditionally run from stage to mixing desk. Instead, a single Ethernet cable carries every audio channel — including returns, intercom, and control data. Dante is self-configuring: plug a Dante-compatible device into a Dante network, and it appears on the routing table automatically. In the mesh, Dante connects Yamaha Tio stageboxes to CL5 mixing desks at The Black Lion and above, with AES67 bridging for inter-vendor compatibility. Dante requires a dedicated or VLAN'd Gigabit network for reliable operation.

Tier/Venue Relevance: Black Lion (Tier 4), Priory (Tier 5), Spa Gardens (Tier 6), Royal Hall (Tier 6). Harbour Tavern and South Beach use local audio only (phone mics, laptop input).

F

Fairlight* — Blackmagic's professional audio mixing engine, built into ATEM switchers. Up to 132 channels in the ATEM 4 M/E Constellation IP Plus.

Fairlight provides full dynamics processing (compression, limiting, gating), EQ, delay, and effects on every audio channel inside the ATEM switcher. No external audio mixer is required for basic to intermediate productions. In the mesh, the Fairlight engine inside the ATEM handles all hub audio routing, with the Fairlight Audio Panel 40 providing physical fader control connected via USB to a Mac Studio, which routes audio over 10G network to the ATEM's Fairlight engine. This setup eliminates the need for a separate audio console at the hub.

Tier/Venue Relevance: Integrated into all ATEM Constellation switchers — relevant for Black Lion (1 M/E Constellation), Priory (Television Studio 4K8), Spa Gardens (4 M/E Constellation IP), and Royal Hall/hub (4 M/E Constellation IP Plus).

Fujinon Duvo HZK 25-1000mm* — A 25-1000mm phantom-powered box lens for broadcast cameras. ~£125k each. Used exclusively on the Royal Hall's URSA Cine 12K rigs.

The Duvo HZK 25-1000mm is a 40x zoom lens designed for large-venue and sports production. Its servo motors and encoder outputs allow remote control of zoom, focus, and iris from a tripod handle or a remote control panel. The "box" form factor integrates all lens mechanics into a sealed unit that mounts directly to the camera. Two of these lenses are specified for the Royal Hall — one on the main A-camera (wide-to-mid shots) and one on the B-camera (close-ups and detail). They are the single most expensive individual items in the entire mesh, costing more than many entire venues.

Tier/Venue Relevance: Royal Hall (Tier 6 — Unlimited) exclusively. Not used in any other venue.

H

HyperDeck Studio* — Blackmagic's broadcast recording deck. Records SDI or HDMI video to SSD or SD card. Used for ISO recording and playback.

HyperDeck recorders function like the tape decks of old broadcast, but recording to high-speed SSDs instead of tape. The HyperDeck Studio HD Pro records to hot-swappable SSD slots, supports RS-422 deck control, and can record in ProRes or DNxHD. In the mesh, HyperDeck ISO recorders at the hub capture individual camera feeds (ISOs) from every venue, recording directly to the Cloud Store over the network for instant post-production access. This provides the raw materials for a multi-camera edit without the camera operator needing to manage any recording media.

Tier/Venue Relevance: Central Production Hub. Could also be used at Royal Hall or Spa Gardens for local backup recording.

I

ISO Recording* — Recording each individual camera feed separately (rather than just the switched programme feed). Enables multi-camera post-production editing.

ISO recording captures every camera angle as a separate file, timecode-synced to the same timeline. In post-production, the editor can switch between angles freely, cut reactions, and build a more dynamic final edit than the live-switched programme. The mesh's HyperDeck ISO recorders capture up to 64 individual feeds at the hub, recording to the Cloud Store for shared access. The phrase "ISO" comes from photography's "film speed" but has been adopted in video production to mean "isolated" recording.

Tier/Venue Relevance: Central Production Hub primarily. Any venue recording individually could capture ISOs.

L

Ladder (The)* — The conceptual framework of the series: a spectrum of broadcast production quality from £0 to £815k, where every rung is valid and scalable.

The ladder is the series' core idea. Rather than a binary "pro vs amateur" split, the ladder recognises that production quality exists on a continuous spectrum with diminishing returns at the top end. Each rung of the ladder corresponds to a budget tier and a venue in the mesh. There is no "correct" rung — only the rung that fits your context. See Chapter 4 for the full treatment.

Tier/Venue Relevance: The entire series. Every venue, every tier.

M

Mac Studio* — Apple's compact workstation, used as the processing hub for audio routing and control systems at the central production hub.

The Mac Studio runs the software that connects the Fairlight Audio Panel 40 to the ATEM's Fairlight engine over the network. It also runs the ATEM Software Control application for switcher configuration, MultiView customisation, and macro programming. The Mac Studio is chosen over a PC for its reliable performance with Blackmagic software and its small physical footprint in the rack room. It connects to the ATEM via 10G Ethernet.

Tier/Venue Relevance: Central Production Hub. Also used at Royal Hall for control.

Mesh (The)* — The interconnected network of venues, protocols, and production tiers that forms the Bridlington Festival broadcast. A single system that spans from £0 phone cameras to £815k cinema rigs.

The mesh is the series' name for the whole system — not just the technical infrastructure, but the philosophy behind it. A mesh network has no single point of failure (many venues can run independently). A mesh broadcast has no single entry requirement (you can join at any tier). The term deliberately echoes mesh networking terminology while standing for a broader idea: a flexible, scalable, interconnected production system.

Tier/Venue Relevance: The entire series. Every venue is a node in the mesh.

Mist Server* — Software by BirdDog that translates between video protocols. Used when NDI-to-SRT conversion is needed.

Mist Server runs on a computer and converts between NDI, SRT, RTMP, RTSP, HLS, and other video streaming protocols. In the mesh, Mist Server could be used at Harbour Tavern if OBS's built-in SRT encoding proves unreliable, providing a dedicated protocol translation layer. It's also useful as a test tool for experimenting with different transport protocols before committing to hardware encoders. Mist Server is free for basic use, with paid upgrades for advanced features.

Tier/Venue Relevance: Harbour Tavern (Tier 1 — No Budget) primarily. Useful as a test tool at any tier.

N

NDI* — Network Device Interface. NewTek's protocol for sending video, audio, and metadata over a local IP network. Free for software use.

NDI transmits high-quality, low-latency video over standard Gigabit Ethernet with no dedicated video infrastructure. It's used locally within a venue — never over the public internet in this mesh. At Harbour Tavern, NDI carries phone camera feeds to the OBS laptop, where OBS can switch multiple NDI sources, apply graphics, and encode to SRT for transport to the hub. NDI also appears in monitoring setups where a single laptop can display multiview feeds from multiple networked sources. See also SRT, SMPTE 2110.

Tier/Venue Relevance: Harbour Tavern (Tier 1), South Beach (Tier 2), and any venue needing local software-based routing. Not used for inter-venue transport.

NMOS* — Networked Media Open Specifications. An open standard for controlling IP-based media devices. Enables "find, connect, control" over a network.

NMOS is the control layer that makes SMPTE 2110 networks practical. Without NMOS, every 2110 stream would need manual IP addressing, port configuration, and routing — unscalable beyond a handful of sources. With NMOS, a control application (like the ATEM's internal software or a third-party controller) can discover all devices on the network, connect them dynamically, and manage routing changes in real time. The ATEM 4 M/E Constellation IP Plus includes full NMOS support, enabling integration with third-party 2110 equipment.

Tier/Venue Relevance: Royal Hall (Tier 6), Central Production Hub. Used wherever SMPTE 2110 is deployed.

O

OBS* — Open Broadcaster Software. Free, open-source video production software for streaming and recording.

OBS is the backbone of the no-budget production tier. It captures video and audio sources (phone cameras via NDI, USB webcams, screen captures), allows switching between them, overlays graphics, mixes audio, and encodes to SRT (or RTMP, or any other streaming protocol) for transport to the hub. OBS runs on a laptop behind the bar at Harbour Tavern, providing professional streaming capability for zero cost. It's also useful at any tier as a backup, a test tool, or a graphics overlay engine.

Tier/Venue Relevance: Harbour Tavern (Tier 1), South Beach (Tier 2 — as backup). Useful utility software at any tier.

P

PTP* — Precision Time Protocol (IEEE 1588). Synchronises all devices on a local network to within microseconds. Used inside the hub and high-end venue racks.

PTP is essential for SMPTE 2110 networks. With uncompressed video and audio flowing over IP, every device must sample at exactly the same instant. PTP achieves sub-microsecond accuracy by measuring network latency and adjusting each device's clock accordingly. Each venue runs its own PTP domain independently — PTP cannot span across the public internet because network latency variations ("jitter") would break the timing lock. The Royal Hall and hub each have a PTP grandmaster clock that all local 2110 devices synchronise to.

Tier/Venue Relevance: Royal Hall (Tier 6), Central Production Hub. Required for any SMPTE 2110 deployment.

R

Red Button* — The mesh's multi-channel output system. A master broadcast programme plus five additional "deep-dive" channels, accessible to viewers via a VT-style "Red Button" interface.

The Red Button concept evokes the BBC's "press red" interactive TV service. The mesh's Red Button system provides the master programme (best-of switching across all venues) plus five viewer-selectable channels: dedicated camera feeds for the headline act, the beach/outdoor stage, the second stage, a "mix" channel, and a clean-feed channel. This means the home viewer at any given moment can choose the main programme or a deep dive into any venue or camera angle. The Red Button is described in detail in Chapter 1.

Tier/Venue Relevance: The entire mesh. Requires at least one venue and the hub to implement.

Rio* — Yamaha's I/O rack (stagebox) for the CL/QL series digital mixing desks. Provides analog-to-Dante conversion at the stage.

The Rio stagebox sits on stage, close to the microphones and instruments, and converts analog audio into Dante digital audio that flows over a single Ethernet cable to the mixing desk. A single Rio3224-D2 provides 32 mic/line inputs and 16 line outputs. In the mesh, a Rio sits on stage at The Priory, connecting to a Yamaha CL1 mixing desk via a single Dante cable. Only tiers 5+ use Rio stageboxes — lower tiers use smaller Dante boxes (Tio) or direct analog connections.

Tier/Venue Relevance: Priory (Tier 5), Spa Gardens (Tier 6), Royal Hall (Tier 6). Not used in tiers 1-4.

S

SDI Expander 8X 12G* — Blackmagic's hardware bridge between SDI and SMPTE 2110 IP domains. Converts up to 8 SDI signals to/from 2110 over 100G.

The SDI Expander is the architectural glue of the hub and Royal Hall. It takes the SDI outputs from Streaming Decoders (which receive SRT from venues) and converts them into SMPTE 2110 IP streams that the ATEM switcher can route. In reverse, it takes the ATEM's 2110 programme outputs and converts them back to SDI for the Streaming Encoders (which send SRT out to distribution). This bridge enables the entire venue-to-internet transport chain without needing SDI patch panels, DA distribution, or bulky cable infrastructure in the rack room.

Tier/Venue Relevance: Royal Hall (Tier 6), Central Production Hub. Essential wherever SDI devices (decoders, encoders) need to connect to a 2110 IP-based ATEM switcher.

SMPTE 2022-7* — Seamless Protection Switching. Two redundant data paths carrying identical video — if one fails, the other continues without interruption.

SMPTE 2022-7 is broadcast insurance. The ATEM and SDI Expander send every video signal down two independent network paths simultaneously. If a cable gets unplugged, a switch fails, or a transceiver dies, the receiving device seamlessly switches to the redundant path with zero frame loss. This requires dual network infrastructure (two switches, two cables to each device, two power supplies) but provides genuine broadcast-grade reliability. In the mesh, SMPTE 2022-7 is used inside the Royal Hall and hub for all critical signal paths.

Tier/Venue Relevance: Royal Hall (Tier 6), Central Production Hub. Overkill for tiers 1-5.

SMPTE 2110* — The broadcast industry standard for uncompressed video, audio, and metadata over IP networks. Requires 10G-100G networking.

SMPTE 2110 replaces SDI, HDMI, and other point-to-point video connections with IP-based routing. Video is carried as separate streams (essence-separated — video on one stream, audio on another, metadata on a third), all synchronised by PTP. This decoupling enables any source to reach any destination without patching cables. In the mesh, 2110 operates only inside the Royal Hall, Spa Gardens, and the hub — never for inter-venue transport, where SRT over public internet is used instead.

Tier/Venue Relevance: Spa Gardens (Tier 6), Royal Hall (Tier 6), Central Production Hub. Not used in tiers 1-5.

SRT* — Secure Reliable Transport. The primary inter-venue transport protocol of the entire Bridlington Mesh. Every venue-to-hub connection uses SRT over standard public internet.

SRT is the mesh's superpower. Developed by Haivision and now an open standard, SRT wraps video in a transport layer that handles packet loss, jitter, and bandwidth variation over unpredictable internet connections. Unlike raw UDP or RTMP, SRT has built-in error recovery that requests retransmission of lost packets without breaking the stream. The mesh encodes each venue's video to H.265, wraps it in SRT at the venue, and decodes it at the hub — whether the venue is 200 metres or 2 kilometres away. SRT works over any IP connection, from a pub's consumer broadband to a venue's dedicated fibre.

Tier/Venue Relevance: Every venue in the mesh. The single most important protocol in the entire system.

Subtitle Generation* — Automated closed captioning using speech-to-text. Generates subtitles in real-time during the broadcast.

The hub's Mac Studio can run speech-to-text models (either local deployment like Whisper or cloud services) to generate real-time subtitles for the broadcast. This is essential for accessibility and increasingly expected by viewers. Subtitles are layered as a graphics key in the ATEM switcher, appearing on the master programme output. The subtitle workflow will be detailed in a future post covering graphics and accessibility.

Tier/Venue Relevance: Any tier where the hub is deployed. Processing load scales with the number of subtitle streams.

T

Tally* — A visual indicator on a camera showing whether it is currently live (on air) or preview (next to be selected).

Tally lighting is one of the most basic but essential broadcast tools. A red tally light means "you are live" — the camera operator knows their shot is being seen by viewers. A green tally means "preview" — the director is looking at your shot but hasn't switched to it yet. In the mesh, tally is carried over SDI (embedded in the return video signal) or over a separate network connection (for IP cameras). ATEM switchers send tally information automatically to connected cameras. Sewerby Hall tier and below may lack tally, relying on verbal direction or manual coordination.

Tier/Venue Relevance: All tiers from Black Lion upwards (via SDI tally). Harbour Tavern and South Beach lack proper tally — operators use verbal cues via phone calls.

Tio* — Yamaha's compact Dante stagebox. Provides 8 or 16 inputs/outputs over a single Ethernet cable. Used in The Black Lion instead of the larger Rio stagebox.

The Tio1608-D2 provides 16 mic/line inputs and 8 line outputs in a compact half-rack unit. It connects to a Yamaha CL5 (or compatible) mixing desk via a single Dante Ethernet cable. In the mesh, the Tio sits on stage at The Black Lion, connecting back to the CL5 in the production area. The Tio is the bridge between the "no dedicated audio networking" tier (Sewerby Hall, Harbour Tavern, where audio goes direct into the camera or ATEM) and the "proper audio networking" tier (Priory and above, where full Rio stageboxes are used).

Tier/Venue Relevance: Black Lion (Tier 4). Also useful at Priory as a compact I/O expander.

U

UniFi* — Ubiquiti's line of networking hardware. Used in budget-conscious venue installations for cost-effective managed switching.

UniFi switches and access points provide enterprise-grade networking at consumer-ish prices. In the mesh, UniFi equipment networks the Harbour Tavern (a single small switch for the laptop and phone Wi-Fi) and Sewerby Hall (a managed switch for the ATEM Mini and Streaming Encoder). UniFi's single-pane-of-glass management app makes configuration straightforward. The mesh avoids UniFi for tier 4+ venues, where dedicated broadcast-grade networking (Cisco, Netgear M4250, or direct connection) is preferred.

Tier/Venue Relevance: Harbour Tavern (Tier 1), Sewerby Hall (Tier 3). Not used in tier 4+ venues.

URSA Cine 12K LF* — Blackmagic's flagship cinema camera. Large-format sensor, 12K resolution, 16 stops dynamic range, PL mount. ~£5,000 (body only).

The URSA Cine 12K LF is the cinema camera at the top of the mesh's camera ladder. Its large-format sensor provides shallower depth of field and wider field of view than Super 35 sensors. Its 12K resolution allows 4K delivery with room to reframe and stabilise in post. In the mesh, two URSA Cine rigs serve as the A-camera and B-camera at Royal Hall, paired with Fujinon Duvo box lenses for remote operation. The rigs connect to the ATEM over SMPTE 2110 with camera control, talkback, and tally in a single fibre optic cable.

Tier/Venue Relevance: Royal Hall (Tier 6 — Unlimited) exclusively. Not used in other venues.

Chapter 11: What Comes Next

If you've read this far, you've absorbed the full architecture of the Bridlington Mesh — the venues, the tiers, the protocols, the hub, the power reality, the budget maths, and the glossary to make sense of it all. You know the shape of the system.

Now let me tell you what comes next.

This chapter is a roadmap. The remaining six blog posts in this series will take every section of the mesh and pull it apart in granular detail. Each post focuses on one or two venues at a specific budget tier, drilling into the exact kit choices, the wiring diagrams, the configuration steps, the pitfalls, and the lessons learned. Every post stands alone (you can read the ones relevant to your budget), but together they build a complete picture of the full system.

Here's what's coming.

Post 1: The Guerilla Tier — Harbour Tavern, South Beach & Sewerby Hall

Budget range: £0 to £8,000

This is where the mesh begins. Three venues, three radically different approaches to producing a broadcast with essentially no money.

Harbour Tavern shows you what you can do with phones, a laptop, and free software. We pick apart the OBS workflow — capturing NDI feeds from iPhones, switching between them, overlaying graphics, encoding to SRT, and sending it to the hub. We talk about the terror of Windows Update choosing your go-live moment, the art of convincing a pub landlord to let you use their Wi-Fi, and the surprising quality you can achieve with a £0 equipment budget.

South Beach goes mobile-native. No laptop, no local switching — just phones streaming directly to the hub over cellular, with the Blackmagic Camera App providing manual exposure control and direct SRT output. We talk about cellular bonding, signal reliability, and what happens when a seagull stands in front of your lens.

Sewerby Hall is the first rung with actual budget — £8,000 for a complete broadcast chain. An ATEM Mini Pro for local switching, a Streaming Encoder for reliable SRT transport, and a proper audio setup. This is where we stop crossing our fingers and start building predictable infrastructure.

Kit deep-dives: OBS (the full "Technical Biography"), Blackmagic Camera App, ATEM Mini Pro, Streaming Encoder 4K, Streaming Decoder 4K.

Post 2: The Back Room Indie Stage — The Black Lion

Budget range: ~£26,000

The Black Lion is the sweet spot. This is where the mesh stops feeling like a hack and starts feeling like a proper production. The budget buys you real cameras, real audio, and a real switcher — all for less than the cost of a single piece of top-tier broadcast gear.

The Blackmagic Pocket Cinema Camera 4K is the heart of this post. We explore its dynamic range, its colour science, its limitations (no built-in ND filters, no professional video outputs without a cage), and why it's the most popular cinema camera in the world for indie creators.

The Yamaha Tio 1608-D2 and CL5 mixing desk introduce Dante audio networking for the first time in the series. We cover Dante discovery, channel patching, latency management, and the moment you realise you can route any microphone to any output without touching a single cable.

The ATEM 1 M/E Constellation 4K provides SDI-based switching with full tally, talkback, and camera control. This is the post where we cross from "hobbyist" into "professional workflow."

Kit deep-dives: BMPCC 4K, Yamaha CL5, Tio 1608-D2, ATEM 1 M/E Constellation 4K, Sennheiser Spectera wireless.

Post 3: The Professional Satellite — The Priory & The Spa Gardens

Budget range: ~£56,000 to £96,000

Two venues, one post. The Priory represents the £56k professional tier — a heritage venue with dedicated studio cameras, proper audio infrastructure, and reliable network transport. The Spa Gardens stretches to £96k with outdoor capability and the first deployment of SMPTE 2110 IP routing outside the hub.

The Priory's heart is the Blackmagic Studio Camera 4K Pro — the first camera in the series designed specifically for live production, with built-in viewfinder, talkback, tally, and lens control over a single SDI cable. We cover studio camera operation, lens selection (VariCam zoom), and the workflow differences between cinema and studio shooting.

The Priory also introduces the Rio stagebox — Yamaha's full-size Dante I/O rack, replacing the compact Tio used at The Black Lion. We cover Dante network design for larger channel counts, redundant paths, and integration with the ATEM Television Studio 4K8 switcher.

The Spa Gardens (upgrade to ~£96k) adds outdoor production capability: weatherproofing, longer cable runs, generator power, and the ATEM 4 M/E Constellation IP — the first non-hub deployment of SMPTE 2110. We cover the practicalities of running uncompressed IP video outside a controlled environment.

Kit deep-dives: Studio Camera 4K Pro, Rio3224-D2, ATEM Television Studio 4K8, ATEM 4 M/E Constellation IP, Yamaha CL1.

Post 4: The Main Stage "Beast" — The Spa's Royal Hall

Budget: ~£815,000

This is the flagship. The Royal Hall represents the unlimited tier — not because there's no budget ceiling, but because the brief is absolute certainty. Every signal path has a backup, every camera has a box lens with servo control, every piece of infrastructure is built to cinema-grade standards.

The URSA Cine 12K LF is the camera, paired with Fujinon Duvo HZK 25-1000mm box lenses — the single most expensive individual items in the entire mesh. We cover large-format cinematography in a live production context, the workflow differences between 12K capture and 4K delivery, and why the full-frame look matters for the headline act.

SMPTE 2110 gets the full treatment. We cover PTP synchronisation, NMOS discovery and control, SMPTE 2022-7 seamless protection switching, and the 100G network backbone that makes it all work. Every protocol from Chapter 6 is deployed here in full production context.

The ATEM 4 M/E Constellation IP Plus at Royal Hall mirrors the hub's switcher, enabling local switching that can hand off clean feeds to the hub without re-processing. The SDI Expander 8X 12G bridges legacy SDI devices into the 2110 IP domain.

Kit deep-dives: URSA Cine 12K LF, Fujinon Duvo HZK 25-1000mm, ATEM 4 M/E Constellation IP Plus, SDI Expander 8X 12G, Arri Skypanel lighting.

Post 5: The Command Nexus — The Central Production Hub

Budget: ~£136,000

The hub chapter. The decoder wall, the encoder wall, the Mac Studio, the Fairlight Audio Panel, the ATEM 4 M/E Constellation IP Plus — every piece of hub infrastructure pulled apart and explained.

We cover:

• The decoder wall: 16 Streaming Decoder 4Ks receiving SRT from every venue, outputting SDI to the SDI Expanders
• The SDI Expander bridge: converting decoder SDI to SMPTE 2110 IP for the ATEM, and converting ATEM 2110 outputs back to SDI for the encoders
• The encoder wall: 7 Streaming Encoder 4Ks sending Red Button feeds to distribution
• The gallery layout: where the director, vision mixer, and audio engineer sit, what they see, what they control
• The audio suite: Fairlight Audio Panel 40 connected via USB to Mac Studio, routing over 10G network to the ATEM's Fairlight engine
• The rack room: power distribution, network switching, cable management, cooling
• Cloud Store Ultra 48TB: recording every feed simultaneously for post-production
• Bandwidth management: how 11 concurrent 4K SRT streams coexist on a ~500 Mbps internet connection
• The "hub anywhere" philosophy: van, college, spare room — the hub is defined by bandwidth, not location

Kit deep-dives: ATEM 4 M/E Constellation IP Plus, Streaming Encoder 4K, Streaming Decoder 4K, SDI Expander 8X 12G, Fairlight Audio Panel 40, Mac Studio, Cloud Store Ultra 48TB, HyperDeck Studio HD Pro.

Post 6: The "Red Button" Reality

Budget: The final tally (~£1.1m across all venues)

The capstone post. Everything comes together.

We cover the five Red Button feeds in detail: the master programme, the headline act ISO, the second stage, the mix channel, and the clean feed. How each is created, how they're structured in the ATEM, and how viewers access them.

We cover the post-production workflow: how HyperDeck ISO captures drop into the Cloud Store, how editors access and assemble the multi-camera edit, and how the final cut becomes the on-demand archive.

We do the final tally — the full £1.1m cost across all venues — and revisit the digital sovereignty argument from Chapter 9 with the weight of everything we've built. Do you still need the cloud? When does cloud distribution make sense versus self-hosting? Where does the mesh end and the internet begin?

And we close with the central promise of the series: you can build any part of this mesh. You can start at the Harbour Tavern with £0 and climb the ladder, or you can build the full system. The knowledge is here. The choices are yours.

How They Connect

Each post covers a slice of the mesh, and they all connect through the Central Production Hub.

Picture a hub-and-spoke diagram:

Hub&Spoke.001.jpeg

Every venue stream arrives at the hub. The hub merges them into the Red Button outputs. Post 6 distributes those outputs to viewers.

Posts 1-4 can be read in any order (each covers a different tier). Post 5 (the hub) makes the most sense after reading at least one venue post, since the hub needs venues to serve. Post 6 (the conclusion) should be read last.

The Recurring Features

Every post in the series will include these recurring sections.

Technical Biography: A dedicated section for each major piece of kit. We cover its specifications, its place in the market, its strengths and weaknesses, its quirks, and where it sits on the ladder. These biographies build into a comprehensive reference across the series.

Eco-Reality Check: Every post includes a power consumption audit and environmental impact assessment. The hub shreds watts. The Royal Hall shreds more. But so does the cloud server handling equivalent processing. We'll keep the honest scorecard running across all six posts.

Protocol Glossary: While Chapter 10 covers the full glossary, each post includes a focused "protocols used here" section so readers don't need to cross-reference. For example, Post 2 (The Black Lion) focuses on Dante and SDI, while Post 4 (Royal Hall) covers SMPTE 2110, PTP, NMOS, and SMPTE 2022-7.

Jim Rant (☕): At least one rant per post. Digital sovereignty. The cloud subscription trap. The value of owning your infrastructure. The freedom of open standards. The pain of proprietary ecosystems. I will not be contained.

The Final Promise

By the end of this series — all six posts, all six budget tiers, all seven venues, the hub, the Red Button, and the conclusion — you will understand how to build any part of the Bridlington Mesh at any budget level.

You will have the knowledge to produce a multi-venue broadcast with phone cameras from the Harbour Tavern, and the roadmap to upgrade it all the way to the Royal Hall's cinema-grade standard. Every piece of kit will have been explained in context. Every protocol will have been demonstrated in practice. Every cost will have been laid bare.

The mesh is a ladder. This series gives you feet to climb it.

One Last Thing

That's it. Twelve chapters, covering the full architecture of the Bridlington Mesh. The venues, the tiers, the protocols, the hub, the power, the budget, the roadmap, and the resources.

If you've read all twelve chapters, you now understand how to build a multi-venue IP broadcast network at any budget level. You understand the ladder. You understand the trade-offs at each rung. You understand that the Harbour Tavern and the Royal Hall coexist in the same mesh, producing the same broadcast, reaching the same viewers.

The only thing left is to build.

Pick a venue. Pick a rung on the ladder. Start with what you have. Add what you need. Climb at your own pace.

The mesh is waiting.