A stream that dies mid-event is the worst failure in live production, because there is no second take. Almost always it is one of five things.
1. Bitrate set too high for the connection
The commonest cause by a distance. People set the bitrate from what they pay for rather than what they get.
Measure your actual upload. Then set the bitrate to about seventy per cent of it. A stream using every available bit will break the moment anything else touches the network.
2. Wi-Fi
Wi-Fi is fine until it is not, and when it fails it fails during the event. Plug the streaming machine into ethernet. If that is genuinely impossible, use 5GHz, stay near the access point, and keep the audience off that network.
3. Upload contention
Your stream is not the only thing using the connection. Backups, updates, cloud sync and an audience on the guest Wi-Fi all take from the same pipe.
Pause backups and sync before you go live. If the venue has one connection for everything, get your stream onto its own if you can.
4. The encoder is overloaded
If the processor is pinned, frames get dropped at the encoder rather than in transit. This looks identical to a network problem and is not one.
Use hardware encoding so the graphics card does the work. Lower the resolution or frame rate before you lower quality settings. Close everything else.
5. Heat
A laptop encoding video for two hours gets hot and quietly slows itself down. A stream that is perfect for twenty minutes and degrades after forty is usually thermal.
Get air under the machine, keep it off soft surfaces, and if it happens repeatedly, drop the resolution.
What good software should do about it
- Drop quality rather than drop the stream when the connection struggles.
- Reconnect on its own without you noticing.
- Tell you which destination is failing, not just that something is.
- Keep recording locally regardless, so a lost stream is not a lost event.
The check that prevents most of this
Run a pre-flight check before every event — connection, destinations, disk space, sources. Five minutes before is when a problem costs nothing to fix. Five minutes after you are live, it costs the event.