Every live stream is a river of data leaving the building, and it only takes one narrow point for the whole thing to stutter. This guide explains what the stream needs, how to find out what the venue can actually give you, and how to build a connection with no single point of failure.
How much upload do you need?
Streaming is about upload, the direction most connections are weakest in. A 1080p stream at a typical 5–6 Mbps needs a stable line with headroom of roughly twice that — 10–12 Mbps of consistent upload — because the encoder's output fluctuates and other traffic on the line competes. Add a second destination or a backup stream and it doubles. Remote contributors coming in use download, which is usually plentiful. Use our bandwidth calculator for a number that includes headroom.
Why venue Wi-Fi fails
Wi-Fi shares a radio channel with every phone in the room. The connection that tested at 80 Mbps at 8 a.m. in an empty hall is fighting 400 devices by 10 a.m. Guest networks also commonly throttle per device, block the ports and protocols streaming uses, and drop sessions after a fixed time. Wi-Fi is fine for a laptop reading email; it is never the primary path for a stream that matters.
Wired, dedicated, tested
The professional standard is a wired Ethernet connection dedicated to the stream, ideally on its own VLAN or physical circuit separate from the venue's guest and office traffic. Ask the venue three questions: what's the upload speed on a wired port near the gallery position? Is it shared with guest Wi-Fi? Can they confirm outbound ports 1935 (RTMP), 443 and the SRT/UDP ranges are open? Then test it from the actual gallery position, at the time of day the event happens, with the encoder you'll use. A speed test from the venue manager's office at 3 p.m. on a Tuesday tells you nothing.
Bonded cellular: the second path
A bonded cellular encoder (LiveU, Teradek and similar) combines several 4G/5G SIMs from different networks into one reliable link. It's how news crews go live from anywhere. For events it's the backup path — and in venues with poor fixed lines, sometimes the primary. Budget a few hundred pounds per job; test it in the room, because basements and steel-framed buildings kill mobile signal.
Automatic failover
Having two paths only helps if the switch between them is instant. Modern encoders and bonding units can fail over between wired and cellular automatically, and streaming protocols like SRT tolerate packet loss far better than old RTMP. Ask your production team how failover works on their setup and how long the audience would see a glitch. The right answer is "a second or two, and they probably won't notice".
Latency and what it means for interaction
Standard streaming delivers video 15–45 seconds behind real time; low-latency modes get to 3–8 seconds. That delay is fine for a broadcast, awkward for live Q&A (the audience is answering a question you asked half a minute ago) and unusable for two-way conversation. Design your interaction around the latency you'll actually have — our delivery guide explains the trade-offs.
The checklist
- Dedicated wired line, tested from the gallery position, at the right time of day.
- Upload at least 2× your total stream bitrate, sustained.
- Ports and protocols confirmed open with venue IT.
- Bonded cellular backup, tested in the room.
- Automatic failover confirmed and rehearsed.
- Remote contributors briefed on their connections.
If a venue can't answer the questions above, assume the worst and bring your own connectivity.