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To bring an FFmpeg stream back after an OVHcloud VPS reboot, run FFmpeg as a boot-enabled systemd service with a restart policy—not as a command launched only in an SSH session. Then verify the VPS, service, YouTube ingest connection, and live event separately. Restarting FFmpeg can restore the encoder process, but it does not guarantee that YouTube will resume the same live event without interruption.
Why an SSH-launched FFmpeg process stops at reboot
A command started in a terminal is not, by itself, configured to run again when Linux boots. OVHcloud’s systemd service guide explains that processes running only in an SSH session stop when a VPS reboots and demonstrates using a service to start a process at boot and restart it after failure. Its example is for another application, not FFmpeg; use the service pattern, not its application command.
There are two different recovery goals: starting the encoder process again and getting YouTube’s live event and player back into the desired state. A service manager can help with the first. It cannot, on its own, ensure the VPS booted correctly, the network is available, the credentials are valid, or the same YouTube event is still accepting the feed.
Configure FFmpeg as a systemd service
Adapt the unit to your Linux distribution, FFmpeg build, actual input, and existing command. The service needs the real executable and arguments, a user with access to the input and required files, a working directory if the command uses relative paths, ordering that accounts for network availability, a restart policy, and boot enablement. Do not copy an unrelated service’s command or assume that an FFmpeg reconnect option works without checking documentation for your installed version.
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Prepare the command and runtime environment
- Record the full FFmpeg command that successfully streams in your current setup, including its input, output destination, and options. A unit must run the same intended job; a missing input file or different environment can cause it to fail at boot.
- Use the absolute path to FFmpeg and any files the command needs. Set a working directory if the command refers to relative paths.
- Where practical, run the service as a dedicated, unprivileged user and ensure that user can read the source and required configuration.
- Plan for network readiness and outbound access to YouTube. A process starting before usable connectivity is available may fail to establish its feed.
Create and enable the unit
Create a systemd unit that describes the FFmpeg job and includes the appropriate service user, working directory, executable and arguments, restart behavior, and install target. OVHcloud’s example uses After=network.target, Restart=on-failure, a User, WorkingDirectory, and an install target. Treat these as elements of a general pattern, not a ready-made FFmpeg configuration: exact dependency ordering and unit syntax should be checked against your distribution’s systemd documentation.
After saving a unit, reload systemd’s unit definitions, enable the service for boot, and start it. Use your distribution’s systemd documentation for the exact commands and confirm the unit name and syntax before applying them. Inspect the service status and logs before relying on a reboot test. Do not add unverified FFmpeg flags or assume a particular order of FFmpeg options based on this generic service pattern.
Keep the YouTube ingest URL and stream key correct
YouTube’s encoder setup instructions direct creators to copy the server URL and stream key from Live Control Room into the encoder. Confirm that the service uses the current URL and key. If you reset the key in YouTube, update the service configuration too; YouTube also documents stream settings and key controls.
- Treat the stream key like a credential: restrict access to the configuration file and do not expose a real key in public examples, logs, or support messages.
- Check that the service user can read the configuration and that the unit passes the expected environment to FFmpeg.
- If a key is invalid or has been reset, replace the stored value with the current key from Live Control Room.
Check YouTube’s encoder settings and bandwidth
A service that starts successfully can still send a feed YouTube cannot use reliably. Match the encoder configuration to your actual source, desired resolution and frame rate, and available outbound bandwidth. YouTube’s current encoder settings guidance covers RTMP/RTMPS, supported video codec configurations including H.264, H.265/HEVC, and AV1 in relevant configurations, CBR, and settings by resolution and frame rate. It recommends a two-second keyframe interval and says it should not exceed four seconds. It recommends RTMPS for encrypted delivery.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsUse YouTube’s resolution-specific recommendations rather than applying one bitrate to every stream. YouTube also recommends leaving 20% headroom between the stream’s total bitrate and available upload bandwidth; its live encoder troubleshooting guidance advises checking connectivity and encoder health. If you plan a primary and backup encoder, account for the bandwidth each may require rather than assuming one connection can carry both.
Test a reboot and verify each layer
Use a planned maintenance window and a representative test stream. YouTube recommends preparing well ahead of a live stream, starting the encoder at least 15 minutes before the event, and testing with representative audio and movement. These are operational recommendations, not guarantees of recovery.
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- Check the OVHcloud instance. Confirm in the OVHcloud control panel that the VPS returns to an enabled and running state, and test normal remote access. OVHcloud’s instance management documentation covers instance status, reboot controls, and console access. If normal access fails, use the provider console to distinguish a guest boot issue from an encoder issue.
- Check systemd and the process. Inspect the unit’s status and logs on the VPS. Confirm FFmpeg is running as the intended user and is not repeatedly starting and failing. Review the command path, permissions, working directory, input availability, and environment when the service is inactive or cycling.
- Check the incoming feed in Live Control Room. Confirm YouTube shows an encoder preview and healthy stream status. YouTube’s encoder setup guidance recommends previewing and checking stream health before going live.
- Check what viewers receive. Open the viewer-facing watch page and verify that playback is accessible and behaves as intended. A running process or an incoming preview alone does not establish that the event has resumed for viewers.
Troubleshoot a stream that did not return
The OVHcloud instance is unavailable
Check instance state before changing the FFmpeg service. OVHcloud documents reboot controls and console access in its instance management guide. Use the console to investigate a VM boot problem when normal remote access is unavailable.
The service is inactive or keeps restarting
Read the service status and journal output, then check whether the executable path, unit arguments, permissions, working directory, input source, and environment match the working setup. These are diagnostic checks for the service configuration; OVHcloud’s systemd example establishes the general service pattern but is not an FFmpeg-specific troubleshooting guide.
FFmpeg runs, but YouTube shows no feed
Verify the ingest URL and current stream key in Live Control Room, then check outbound connectivity and encoder health. YouTube’s troubleshooting guidance includes checking or replacing an invalid key, using a current encoder, reviewing CPU load and errors, and testing outbound connectivity.
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The feed returns, but quality is poor
Compare total stream bitrate with available outbound upload capacity, allowing the 20% headroom YouTube recommends. Review the resolution, frame rate, keyframe interval, and bitrate against YouTube’s current encoder settings guidance, then monitor the live preview and stream health.
The old live event has ended
Do not assume that restarting FFmpeg reopens an ended event. Check Live Control Room to determine whether the event is still accepting an encoder feed or whether a new or scheduled stream must be started. YouTube’s encoder setup and stream settings guidance explain feed and key configuration, but do not establish a guarantee of event continuity after a VPS reboot.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.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 pattern in OVHcloud’s systemd service example. | It does not prove the VM will boot, networking will reach YouTube, credentials will remain valid, or the same YouTube event will stay live. |
| Primary and backup encoder failover | Adds a separate encoder recovery path. YouTube’s live streaming tips recommend testing failover by stopping the primary encoder or unplugging its Ethernet connection and checking whether playback rolls to the backup. | It is not a substitute for making the VPS process persistent. Plan the YouTube stream configuration and required capacity, then test whether the player actually rolls over. |
These approaches address different failure points. A service restart handles process supervision on a guest that boots; backup-encoder failover addresses a different encoder failure scenario. Neither should be described as proof of uninterrupted viewing. The useful test is whether the intended YouTube playback recovers under the failure you designed for.
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