Keep FFmpeg in the foreground under a systemd service, then set Restart=on-failure and a measured RestartSec delay. This lets systemd relaunch FFmpeg after qualifying failures and start it at boot. It does not, by itself, prove that YouTube has accepted the feed or that viewers can see it; verify stream health in YouTube Live Control Room.
1. Create a systemd service for FFmpeg
Use this as a starting template, not a drop-in configuration. Replace the example account, FFmpeg path, input, codecs, and output with values that match the Linux host and your stream. Keep FFmpeg in the foreground so systemd can supervise its process.
[Unit]
Description=Church FFmpeg YouTube stream
Wants=network-online.target
After=network-online.target
[Service]
Type=simple
User=stream
ExecStart=/usr/bin/ffmpeg -i INPUT -c:v libx264 -c:a aac -f flv 'OUTPUT_WITH_STREAM_KEY'
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.targetThe stream user and /usr/bin/ffmpeg path are examples. Check the executable path on your system, and use the actual source and output syntax required by your FFmpeg build and YouTube ingest setup. The sample codecs are not a requirement for every source or workflow.
Save, enable, and start it
- Save the unit as
/etc/systemd/system/church-stream.service. - Tell systemd to load the new or changed unit:
sudo systemctl daemon-reload. - Enable it at boot and start it now:
sudo systemctl enable --now church-stream.service. - Check the current service state:
systemctl status church-stream.service. - Follow its logs while it runs:
journalctl -u church-stream.service -f.
Systemd directives and start-rate behavior can vary by installed release. Consult the manual for the systemd version on the host if a directive behaves differently or repeated failures stop producing restart attempts.
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Protect the stream key
The YouTube stream key is a credential: it identifies where the encoder sends its feed and lets YouTube accept it. Anyone who obtains it may be able to send a feed to that stream. Avoid sharing it in public examples or exposing it in logs, and restrict access to wherever it is stored. YouTube says a compromised key can be reset in Live Control Room: YouTube Help: Set up your encoder.
2. Understand what systemd will restart
With Restart=on-failure, systemd restarts the service after qualifying failures, including a nonzero exit, certain signals, a timeout, or a configured watchdog failure. A clean FFmpeg exit is different: it does not meet the ordinary failure condition for this policy. The systemd service manual documents the restart modes and their behavior: systemd.service.
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RestartSec=5in the template spaces restart attempts by five seconds; choose a delay appropriate to the cause and your recovery needs.- Repeated failures are subject to systemd start-rate limiting. A persistent bad key, missing input, rejected ingest, or broken network will not be fixed by retrying indefinitely.
- An intentional
systemctl stop church-stream.servicesuppresses automatic restart. Usesystemctl start church-stream.servicewhen you want to run it again.
For other policies, the manual lists no (the default), on-success, on-failure, on-abnormal, on-abort, on-watchdog, and always. Choose based on how FFmpeg exits and whether a clean exit should mean “done” or “restart.”
3. Separate process recovery from connection recovery
There are two different failure layers. Systemd acts when the supervised FFmpeg process exits in a way covered by its restart policy. FFmpeg may also reconnect through protocol-specific options while it remains running. The FFmpeg protocol documentation describes options such as reconnect, reconnect_at_eof, reconnect_on_network_error, reconnect_on_http_error, reconnect_streamed, and retry limits for HTTP(S) behavior: FFmpeg protocols documentation.
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Those HTTP(S) controls are not universal fixes for an RTMP or RTMPS output. First identify whether the failure is at the input (for example, a camera feed), in the FFmpeg process, or at the output connection. Apply reconnect options only when the installed FFmpeg version documents them for that protocol and direction.
4. Match FFmpeg output to YouTube’s live guidance
A service can be active while sending an unusable feed. YouTube’s current encoder guidance, accessed in 2026, lists RTMP and RTMPS as streaming protocols, supports H.264, H.265, and AV1 codecs, and gives a recommended two-second keyframe frequency that should not exceed four seconds. Its bitrate guidance varies by codec, resolution, and frame rate; use the row that matches your actual output rather than treating one bitrate as universal. YouTube recommends RTMPS: Choose live encoder settings, bitrates, and resolutions.
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| Example YouTube H.264 setting | Minimum bitrate | Recommended bitrate |
|---|---|---|
| 720p at 30 fps | 3 Mbps | 8 Mbps |
| 1080p at 30 fps | 5 Mbps | 14 Mbps |
These figures are YouTube’s current encoder-table guidance accessed in 2026, not guarantees for every source or network. YouTube’s networking guidance recommends 20% upload headroom and warns that connectivity disruption can break a stream: YouTube live encoder network guidance. Reserve capacity for other devices and traffic on the same connection.
5. Test both the service and the broadcast
- Start the service and inspect
systemctl status church-stream.servicefor its state and recent output. - Follow
journalctl -u church-stream.service -fto see whether FFmpeg is still running, exits, or reports input/output errors. - Before a service, test with audio and video movement similar to the intended stream. YouTube says, “Make sure to test before you start your live stream.”
- In YouTube Live Control Room, check stream health and review any messages. Confirm the expected picture and sound rather than relying on the systemd status alone.
A controlled failure test can confirm whether this unit is restarted as configured, but perform it before the real event and verify the result in both the service logs and Live Control Room. A running unit only establishes that systemd sees its process as running; it is not proof of a healthy broadcast.
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6. Troubleshoot common failure patterns
| Symptom | Likely area to check | Next step |
|---|---|---|
| The service fails immediately | Unit syntax, executable path, user permissions, or FFmpeg arguments | Read systemctl status church-stream.service and the journal. Check that the configured FFmpeg path exists and that the service user can access the input and required files. |
| FFmpeg exits, then keeps retrying | A persistent input, key, ingest, or network problem | Inspect the FFmpeg error in the journal and correct the underlying issue; restarts alone will not repair it. |
| The unit is running, but YouTube reports no healthy feed | Output connection, ingest settings, or stream configuration | Check the output protocol and key, FFmpeg output errors, and Live Control Room stream-health messages. |
| The service stopped after an intentional stop | Expected systemd behavior | Run sudo systemctl start church-stream.service when ready to resume. |
| Restart attempts cease after repeated failures | Systemd start-rate limiting | Inspect the service state and logs, fix the cause, and consult the installed systemd manual for the host’s rate-limit behavior. |
| Input disconnects but FFmpeg remains alive | Input protocol recovery rather than process supervision | Check whether the input protocol and installed FFmpeg version support an applicable reconnect option. Do not assume an HTTP reconnect option repairs an RTMP(S) output. |
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