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Run FFmpeg in the foreground under a systemd service, then set Restart=on-failure and a deliberate restart delay. This lets systemd restart FFmpeg after a process failure; it does not prove that YouTube is receiving healthy video. Confirm reception separately in YouTube Live Control Room.
What systemd can—and cannot—recover
systemd supervises the service process. For a long-running FFmpeg job, keep FFmpeg in the foreground so it remains the service’s main process and systemd can observe when it exits. A restart policy such as Restart=on-failure can recover from qualifying process failures, subject to systemd’s start-rate limits. It does not necessarily detect an FFmpeg process that stays alive while input, encoding, or delivery to YouTube has stalled. systemd service documentation.
This guide gives a unit-file structure, not a tested end-to-end FFmpeg command. Replace the illustrative placeholders with your actual input, encoding options, ingest details, and absolute paths; confirm the installed FFmpeg binary path and available options on your server. No particular Hetzner server size, firewall rule, or plan is established here.
Prepare the stream and server account
Create a dedicated service account
Use a dedicated, unprivileged Linux account, such as stream, rather than running the encoder as root. Prepare a working directory and an input or configuration location that this account can read. For example, the unit outline below assumes /srv/stream; create and permission directories to match your own setup.
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Get the YouTube ingest details
Use the ingestion address and stream key supplied for your YouTube Live stream. YouTube’s LiveStreams resource distinguishes primary and backup ingestion addresses and supports RTMP and RTMPS ingest types. A single-output service should use the chosen address; the presence of a backup address does not mean this service sends to both. YouTube LiveStreams API.
Where your encoder and selected YouTube endpoint support it, prefer RTMPS. YouTube documents RTMPS as RTMP over TLS: the connection must use port 443, and TLS SNI must identify the ingestion server hostname. Use the exact endpoint YouTube provides rather than guessing or modifying its host. YouTube RTMPS guide.
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Protect the stream key
Treat the key like a password: anyone who obtains it may be able to send to your broadcast. Do not put a real key in a publicly readable unit file, a screenshot, an article example, or shell history. systemd warns that environment variables are not suitable secret storage because they may be exposed through D-Bus and passed to child processes. Consider a credential mechanism supported by the systemd version installed on your host, and restrict permissions on any file used to deliver the key. systemd execution documentation.
Create a foreground FFmpeg systemd service
Save a service unit such as /etc/systemd/system/ffmpeg-youtube.service. This is a structural example only, not a tested FFmpeg command. The angle-bracket text is explanatory placeholder text; replace it with valid arguments for your input and output. Do not paste the placeholders literally.
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Description=FFmpeg YouTube live stream
Wants=network-online.target
After=network-online.target
[Service]
Type=simple
User=stream
WorkingDirectory=/srv/stream
ExecStart=/usr/bin/ffmpeg <input-and-encoding-options> <youtube-ingest-url>
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.targetSet the details to match your host
ExecStart: use the actual absolute FFmpeg path and a foreground invocation. The placeholder does not specify or validate FFmpeg flags; consult the documentation for the installed FFmpeg build and choose input and encoding settings appropriate for the source and YouTube ingest details.UserandWorkingDirectory: use the service account and directory you prepared. Confirm the account can read the input and any required configuration or credential files.Restart=on-failure: asks systemd to restart the service after qualifying failure, rather than treating every intentional clean exit as a failure. The service documentation recommends this policy for long-running services.RestartSec=5: illustrates a five-second pause before a restart attempt. Choose a considered delay for your workload; repeated rapid failures can run into start-rate limits.- Network ordering: the example expresses a desire to start after the network is online. It is not a guarantee that YouTube is reachable or that the stream is healthy.
Load, enable, and start the service
- Reload unit definitions: run
sudo systemctl daemon-reloadafter creating or changing the unit file. - Enable it for boot: run
sudo systemctl enable ffmpeg-youtube.service. - Start it now: run
sudo systemctl start ffmpeg-youtube.service. - Inspect service state: run
sudo systemctl status ffmpeg-youtube.service. This reports systemd’s view of the process, not YouTube’s reception health. - Read recent logs: run
sudo journalctl -u ffmpeg-youtube.service -n 100 --no-pager. FFmpeg’s stderr is commonly where to look for process errors when the service fails.
Verify the incoming stream in YouTube
Open YouTube Live Control Room and check whether YouTube detects the incoming stream and reports its health. A systemd state of active means the process is running from systemd’s perspective; it does not establish that valid video and audio are reaching YouTube. YouTube’s health messages can identify configuration problems such as bitrate, codec, framerate, GOP, or insufficient video. YouTube stream health status messages.
If systemd says the service is active but YouTube reports no incoming data or unhealthy video, troubleshoot the input, encoding, and ingest connection. Restart automation is not a substitute for confirming the stream at the receiver.
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Troubleshoot the failure you actually have
FFmpeg exits and systemd restarts it
- Inspect the unit’s recent journal entries for FFmpeg stderr and the exit reason.
- Check that the FFmpeg path, working directory, input paths, and file permissions are correct for the service account.
- Verify the process can read its input and any protected configuration or credential files.
Restart=on-failure handles process failures and certain timeouts; it does not promise recovery from every application-level stall.
FFmpeg stays active but YouTube receives nothing
Check the incoming status and health in Live Control Room or the corresponding LiveStreams resource. Investigate whether the input is producing data, whether encoding is yielding usable audio/video, and whether the service is sending to the correct ingest address. An active process alone is not evidence of a working broadcast. YouTube LiveStreams API.
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RTMPS reports TLS or connection errors
Confirm that you are using the RTMPS address supplied by YouTube, that the connection targets port 443, and that TLS SNI identifies the ingest hostname. Also confirm that the installed encoder supports the connection method you selected. YouTube’s RTMPS requirements are documented in its RTMPS ingestion guide.
Restart attempts stop after repeated failures
systemd applies start-rate limits, so a service that repeatedly fails may stop being restarted automatically. Check the service status and manager logs for rate-limit messages. Fix the underlying failure before resetting or starting the service again; do not configure a tight, unlimited restart loop. systemd service documentation.
YouTube reports a stream-health warning
Read the specific health issue rather than changing settings at random. YouTube’s categories can point to bitrate, video or audio codec, framerate, GOP length, or insufficient incoming video data. YouTube health status reference.
RTMP or RTMPS?
| Choice | What it means | What to check |
|---|---|---|
| RTMP | YouTube’s LiveStreams resource includes RTMP ingest addresses. | Use the actual address and key provided for the stream, and confirm encoder compatibility. |
| RTMPS | RTMP carried over TLS, with an RTMPS endpoint available where supported. | YouTube specifies port 443 and TLS SNI using the ingestion server hostname. Check encoder compatibility and the exact supplied endpoint. |
Neither choice removes the need to verify YouTube’s received-stream health. Endpoint availability depends on the ingest details YouTube provides for the stream.
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