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Run FFmpeg under a boot-enabled systemd service instead of launching it in an SSH session. Configure the service to restart after a process failure, then verify the VPS, FFmpeg process, and YouTube Live Control Room separately after a reboot. This brings the encoder process back; it does not guarantee that YouTube will keep the same live event open or that viewers will see an uninterrupted stream.
Why an SSH-launched FFmpeg process stops at reboot
Starting FFmpeg from an interactive SSH shell does not configure it to start again when Linux boots. A reboot ends the running process, and closing the session can also end work tied to that session. OVHcloud’s systemd example explains this limitation and demonstrates moving a process into a service configured for startup and restart. Its example uses Plakar, not FFmpeg, so use it as a service-management pattern rather than copying its application command. OVHcloud: Configure a service with systemd.
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Configure systemd to start your FFmpeg command
Create a unit file for the exact FFmpeg command that already works for your stream. The service needs the executable and arguments, a suitable service user, any required working directory, network ordering, a restart policy, and boot enablement. The precise unit syntax and command-line behavior depend on your Linux distribution and FFmpeg build; the available sources do not establish a tested FFmpeg unit or reconnect command, so verify those details against documentation for the software versions on your VPS.
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Unit components to plan
- Description: a short name that lets you identify the stream service.
- Ordering: use a network-related dependency so the service starts in an appropriate order. OVHcloud’s example includes
After=network.target; that ordering alone does not prove that the VPS has working internet access or that YouTube is reachable. - Execution: provide the full path to FFmpeg and the arguments for your input, encoding, and YouTube destination. Use the same working command and verify quoting and option order for your build.
- User and directory: run under a dedicated, non-root account where practical, and specify a working directory if the command uses relative paths.
- Restart policy: choose a policy that restarts the service after process failure. OVHcloud’s example uses
Restart=on-failure; a restart policy cannot correct a bad command, invalid key, unreachable input, or unavailable host. - Boot enablement: configure the service to start through the system’s normal boot target, then enable it using the procedure for your distribution.
Do not paste a real YouTube stream key into a public example, ticket, or log. Protect the configuration file with restrictive permissions and ensure the service account can read the necessary files without exposing the credential more broadly than needed.
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Check the YouTube ingest settings before rebooting
In YouTube Studio, open Live Control Room for the relevant stream and copy the server URL and stream key into the encoder configuration. YouTube’s encoder setup guidance describes entering these values in the encoder; its stream settings also explain how to reset a key and update the encoder if needed. A reset key invalidates the old credential, so update the service configuration before relying on it. YouTube Help: Set up your encoder for live streaming and YouTube Help: Manage your live stream settings.
Treat the ingest URL and key as configuration that can be checked independently from the FFmpeg process. A running service may still send no usable feed if either value is wrong or the key has changed.
Use YouTube’s encoder recommendations as a separate check
A reboot fix does not make an unsuitable encoding configuration reliable. Match the settings to your source, stream type, and actual outbound capacity; use YouTube’s current table for the relevant resolution and frame rate rather than applying one bitrate to every broadcast.
- YouTube lists RTMP/RTMPS as ingest protocols and recommends RTMPS for encrypted delivery. Supported video codecs vary by configuration and include H.264, H.265/HEVC, and AV1 in relevant setups.
- YouTube recommends constant bitrate (CBR), up to 60 fps, and a two-second keyframe interval that should not exceed four seconds. Confirm the appropriate bitrate for your resolution and frame rate in its current encoder settings guidance: YouTube Help: Live encoder settings, bitrates, and resolutions.
- Your total streaming bitrate must fit the VPS’s available outbound upload bandwidth. YouTube recommends leaving 20% headroom; account for other traffic and any backup encoder when planning capacity. See YouTube Help: Troubleshoot live stream issues.
- Test with representative audio and motion, inspect the preview and stream health, and monitor the live stream. YouTube recommends preparing at least two hours before a stream and starting the encoder at least 15 minutes before the event; these are planning recommendations, not guarantees of recovery after a reboot. YouTube Help: Troubleshoot live stream issues.
Reboot and verify each layer
- Plan a test: choose a time when an interruption is acceptable. A test verifies recovery behavior; it does not establish that a production event will continue seamlessly.
- Check the OVHcloud VPS: after the reboot, confirm the instance returns to an enabled/running state and that you can reconnect. If normal access fails, use the OVHcloud console and available reboot or recovery controls to distinguish a host or guest boot problem from an encoder problem. OVHcloud: Troubleshoot a VPS instance.
- Check the service on Linux: inspect the service’s status and logs using the tools available on your distribution. Confirm the process is present and not repeatedly restarting. If it fails, examine the executable path, permissions, working directory, input availability, and environment.
- Check YouTube’s ingest preview: in Live Control Room, look for incoming video and audio and review stream health. YouTube recommends previewing the stream and monitoring quality. If the preview is absent, confirm the destination, key, and outbound connectivity.
- Check the viewer-facing result: verify whether the watch page is live and accessible. A process restarting successfully and a YouTube event remaining live are separate outcomes.
What systemd recovery does—and does not—cover
| Approach | What it addresses | What it does not establish |
|---|---|---|
| Boot-enabled systemd service with a restart policy | Starts the FFmpeg process after guest boot and can restart it after process failure, following the general service pattern in OVHcloud’s example. | It does not prove that the VM boots, the network reaches YouTube, the credentials are valid, or the same YouTube event remains live. |
| Primary and backup encoder failover | Adds a second encoder path. YouTube recommends testing failover by stopping the primary encoder or disconnecting its Ethernet and checking whether playback rolls to the backup. YouTube Help: Troubleshoot live stream issues. | It is a separate resilience design, not a replacement for making the VPS process persistent. Capacity and YouTube stream configuration need planning, and successful playback rollover must be tested. |
Systemd handles process supervision on the guest; it is not, by itself, high availability. The backup approach adds another encoder path but brings additional configuration and bandwidth planning.
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Troubleshoot a stream that did not return
The VPS is unavailable after reboot
Check the instance’s state in the OVHcloud control panel and use the provider’s console or recovery controls to investigate boot and access problems. Until the guest is available, restarting FFmpeg inside it is not possible. OVHcloud: Troubleshoot a VPS instance.
The service is inactive or repeatedly restarting
Inspect its status and logs. Check that the configured executable exists, the service user has permission to read the input and configuration, the working directory is correct, and the needed environment is available to a non-interactive service. A restart loop usually calls for fixing the failure rather than increasing restart frequency.
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FFmpeg runs, but YouTube has no incoming feed
Verify the server URL and stream key in Live Control Room and the service configuration. Check outbound connectivity, encoder health, CPU load, and errors. YouTube’s troubleshooting guidance also recommends checking or replacing an invalid key and using a current encoder. YouTube Help: Troubleshoot live stream issues.
The feed returns, but quality is poor
Compare the configured bitrate with YouTube’s recommendation for the actual resolution and frame rate, then compare the total stream bitrate with available outbound capacity. Leave YouTube’s recommended 20% upload headroom and monitor stream health rather than assuming a restarted process has restored quality.
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FFmpeg is back, but the original live event ended
Do not assume that restarting FFmpeg reopens the same event. Check Live Control Room to determine whether that event is still accepting an encoder feed or whether you need to start a new or scheduled stream. The service restart alone does not settle event continuity.
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