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Run FFmpeg as the foreground process of a long-running systemd service and set Restart=on-failure with an intentional RestartSec= delay. That can relaunch FFmpeg when it exits because of a qualifying failure. It cannot, by itself, detect every broken output while FFmpeg is still running, or confirm that YouTube has resumed the broadcast. Check the service, FFmpeg logs, YouTube Live Control Room, and viewer-facing stream separately.
What automatic restart can—and cannot—recover
There are three different failure states to distinguish:
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- FFmpeg exits: systemd can restart the service after qualifying failures when configured to do so.
- FFmpeg stays alive but a connection or output fails: protocol-specific reconnect options or FFmpeg’s FIFO muxer may help in some cases. These are separate from systemd’s process restart policy.
- FFmpeg runs again but the sermon is not visible: confirm the preview and broadcast state in YouTube Live Control Room, then check playback from a viewer endpoint. A restarted encoder process does not prove the YouTube event is live.
The systemd service manual recommends Restart=on-failure for long-running services because it attempts automatic recovery from errors. Its effect is subject to systemd’s restart limits; an intentional systemctl stop is not undone by the restart policy. systemd.service(5)
Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minutePC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Configure FFmpeg as a systemd service
Use a foreground FFmpeg process
Make FFmpeg the service’s main process. Avoid a shell wrapper that exits while leaving FFmpeg running as an unmanaged child; systemd needs to supervise the process whose failure should trigger recovery.
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This illustrative unit shows the relevant shape, not a tested or universal command. Replace the placeholders with the actual input, encoding options, ingest URL, and key. Confirm the FFmpeg binary path and installed systemd version before using it.
[Unit]
Description=Church YouTube sermon stream
Wants=network-online.target
After=network-online.target
[Service]
Type=simple
ExecStart=/usr/bin/ffmpeg [the church’s actual input and encoding options] -f flv [YouTube ingest URL and stream key]
Restart=on-failure
RestartSec=5s
[Install]
WantedBy=multi-user.targetRestartSec=5s is an example starting value, not a universal recommendation. The systemd manual lists a default delay of 100 milliseconds, so setting a deliberate delay can avoid an immediate crash-and-restart loop. Choose a delay appropriate to the cause and service; persistent faults will still need fixing. systemd.service(5)
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Load, start, and inspect the service
After creating or editing the unit, use the host’s normal systemd workflow to reload unit definitions and start the service. Check its state and follow its journal, for example:
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journalctl -u your-service-name -fUse the actual unit name in place of your-service-name. Inspect the first FFmpeg error in the journal; later retry messages can obscure the original cause.
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Protect the stream key
YouTube’s encoder setup requires the Live server URL and stream key. Treat the key as a credential: do not post it in public support threads or expose it in broadly accessible unit files or logs. YouTube Help: Go live with an encoder
Choose recovery for the failure layer
| What you observe | Recovery to investigate | What it can address | What it does not establish |
|---|---|---|---|
| FFmpeg exits non-zero or is terminated abnormally | systemd Restart=on-failure and a deliberate delay |
Relaunching the service after qualifying failures | That YouTube accepted the ingest or restored the viewer-facing broadcast |
| FFmpeg remains alive but a supported input connection drops | FFmpeg protocol reconnect options applicable to that input | Reconnection under the protocol’s documented conditions | That input reconnect options will recover a YouTube publishing output |
| FFmpeg remains alive but encounters a recoverable output error | FFmpeg FIFO muxer recovery options, if suitable for the command | Attempting recovery from some output failures while processing continues | Recovery from permanent errors, invalid credentials, or every network condition |
| FFmpeg restarts but viewers still cannot see the sermon | YouTube Live Control Room and viewer-side verification | Checking whether the preview and intended broadcast are restored | Repairing the underlying source, key, encoder, or network fault |
FFmpeg documents reconnect options including reconnect-before-EOF, EOF-triggered reconnection for live or endless inputs, reconnect on network errors, and retry limits. Their applicability depends on the protocol and whether the failing connection is an input. They are not universal output-recovery switches. The FIFO muxer is a separate route for attempting recovery from some output errors. Check the documentation against the installed FFmpeg build, since the online documentation tracks current development and may differ from a local version. FFmpeg protocols documentation · FFmpeg FIFO muxer documentation
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Verify the YouTube broadcast after a restart
- Check the service: confirm systemd reports the unit running and inspect the journal for the cause of the restart and any new FFmpeg errors.
- Check the encoder preview: in YouTube Live Control Room, confirm that the incoming stream preview returns. YouTube’s encoder workflow describes entering the Live server URL and stream key and waiting for the preview; scheduled streams use the Go Live control when ready.
- Check the actual event: confirm the broadcast is live in Live Control Room and verify playback from the intended viewer endpoint. Do not infer public playback from a running FFmpeg process alone.
YouTube lists RTMP and RTMPS as ingest protocols and recommends RTMPS. Its encoder-settings page publishes codec, keyframe, audio, and bitrate guidance by resolution and frame rate. Match the actual FFmpeg command to the current settings for the chosen output; the page recommends a two-second keyframe frequency and says not to exceed four seconds. These are YouTube encoder recommendations, not restart settings, and the help page does not display a publication date. YouTube Help: Live encoder settings, bitrates, and resolutions
Troubleshoot in this order
- Find the first error. Read the earliest relevant FFmpeg error in the journal, not just the final retry or exit message.
- Determine whether FFmpeg exited. If it did, inspect the service’s restart policy, configured delay, restart limits, and logs. If it did not, systemd’s process-exit policy may have nothing to act on.
- Identify the failing side of the connection. Work out whether the issue is an input or output, then check whether the relevant protocol reconnect behavior applies. Consider FIFO recovery only for an appropriate output failure.
- Check persistent causes. Validate the input source, current YouTube server URL and stream key, encoder options, and network path. Repeatedly restarting an unchanged command will not resolve a persistent fault.
- Verify the event and playback. Check Live Control Room and the viewer endpoint. If the encoder appears to be sending but YouTube does not restore the event, use the platform status to guide the next diagnosis rather than assuming another process restart will fix it.
The exact FFmpeg command, operating system, service account permissions, input, and failure log vary by church setup. The unit above is a starting pattern, not a configuration validated for a particular host.
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