To keep FFmpeg publishing after you close SSH or reboot an Azure Linux VM, run it as a systemd service enabled at boot. You still need four independently working pieces: a suitable FFmpeg command and media source, the current YouTube ingest URL and stream key, a service configured for your VM’s systemd version, and logs and network checks to diagnose failures. A running process alone does not prove YouTube is receiving or displaying the stream.
1. Confirm the source, FFmpeg command, and YouTube ingest details
First decide what FFmpeg will read: a local file, a live capture device, or a network input. Each source needs appropriate input options. FFmpeg’s documented command structure is ffmpeg [global_options] {[input_file_options] -i input_url} ... {[output_file_options] output_url} ...; the right options depend on the input, codecs, and destination. Consult the FFmpeg command-line documentation and the protocol documentation for the version and build installed on the VM.
A file-to-network example in FFmpeg’s protocol documentation uses -re with an RTMP URL. That example is not a tested, universal YouTube command. Do not copy its URL or assume its input, encoding, bitrate, frame rate, or looping behavior fits your stream. In particular, file playback, live capture, and a network feed may need different handling.
Get the ingest address and stream key from the channel’s current YouTube Live configuration. Google’s YouTube Live Streaming API RTMPS ingestion documentation specifies port 443 for RTMPS and says the server hostname is required for SNI authentication. Use the actual hostname and application path supplied for your stream; do not guess them, remove the hostname, or silently change an RTMPS URL to cleartext RTMP. Confirm your FFmpeg build and selected endpoint support the transport you configure.
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There is no single codec, bitrate, resolution, frame rate, or keyframe setting that can be responsibly prescribed without the source and a current YouTube encoding specification. Decide whether to stream-copy or transcode based on whether the source streams are compatible with your intended output; verify settings against current YouTube guidance and your installed FFmpeg build before deploying.
2. Run FFmpeg under systemd and start it at boot
A systemd service runs FFmpeg independently of an interactive SSH session and can be enabled to start when the VM boots. Use a dedicated unprivileged account where practical, an absolute path to the FFmpeg executable, explicit input and output configuration, and a working directory that can access the media source.
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Unit directives and their behavior depend on the Linux distribution and systemd version installed on the VM. Before relying on a unit file, verify its syntax with the distribution’s installed systemd documentation and systemd-analyze verify. Then enable the service using the documented procedure for that system. This workflow is not a tested deployment recipe, so do not treat an example unit or generic restart setting as guaranteed for every Azure image.
Choose and test a failure policy deliberately. A restart can recover from an unexpected FFmpeg exit, but a restart loop cannot repair a bad input path, invalid command, unavailable endpoint, or expired key—and it does not prove YouTube ingest succeeded. Verify the behavior on the target VM and inspect the service logs rather than assuming a directive guarantees recovery.
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3. Keep the stream key out of public and routine output
Treat the stream key as a publishing credential. Do not put it in a public repository, screenshot, article example, shell history, world-readable file, or exposed process or log output. Store it through a restricted configuration mechanism supported by the installed systemd version, limit file permissions, and rotate it if exposed. Check the local documentation for the exact environment-file or credential mechanism and parsing rules; shell interpolation should not be assumed.
4. Check Azure Linux networking without risking access
Verify that the VM can resolve and reach the selected YouTube ingestion endpoint over the documented RTMPS port 443. The actual path may also depend on Azure network policy, routes, DNS, and the VM’s firewall, so test from the VM and inspect the configuration that applies to your deployment.
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Azure Linux’s networking documentation describes using networkctl to inspect interface state, ip addr to inspect addresses, and ip route to inspect routes. It also warns that stopping systemd-networkd can immediately terminate networking and leave the VM unreachable except through the serial console. Do not stop it casually over SSH.
5. Verify the service, YouTube ingest, and host health
Check the service and its output on the VM:
systemctl status <service>shows the loaded and active state and recent service output.journalctl -u <service>shows the service journal; usejournalctl -fto follow new system journal entries while diagnosing.
Azure Linux’s system logs documentation covers these tools and notes that ss, top, and free -h can help inspect connections and host resource use. Check FFmpeg’s actual stderr and journal output, the media input, and the current YouTube URL, key, and live configuration. A process showing as active is only one part of the diagnosis; confirm receipt and status in YouTube’s live interface as well.
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If logs disappear after a reboot
On Azure Linux, journal data persists under /var/log/journal/ when that directory exists. Otherwise, journal data is held in memory and is lost on reboot. If you need post-reboot evidence, establish persistent logging and appropriate retention deliberately, accounting for storage use.
6. Troubleshoot by separating the failure points
| Symptom | What to check | Next action |
|---|---|---|
| The service will not load or start | Run systemctl status <service> and inspect journalctl -u <service> for unit or executable errors. |
Verify the unit against the installed systemd documentation and systemd-analyze verify; check the absolute FFmpeg path, account access, working directory, and command. |
| FFmpeg exits and systemd keeps restarting it | Read the FFmpeg error in the journal; distinguish an unexpected exit from an invalid command, missing media, or unavailable endpoint. | Fix the underlying cause and test the chosen restart policy on this VM. Do not use repeated restarts as evidence the stream is healthy. |
| FFmpeg is active, but YouTube shows no stream | Check FFmpeg output and errors, the input’s availability, the current ingest hostname and path, the stream key, and YouTube’s live configuration. | Verify that the selected RTMPS endpoint and port 443 are reachable from the VM and that the channel is configured for the intended stream. |
| The VM cannot connect to the ingest endpoint | Inspect DNS, interfaces, addresses, routes, VM firewall rules, and applicable Azure network policy. | Use networkctl, ip addr, and ip route to inspect host networking; avoid stopping systemd-networkd over SSH. |
| There is no useful journal history after reboot | Check whether /var/log/journal/ exists and whether log retention was configured. |
Configure persistent journal storage and retention if post-reboot diagnosis is needed. |
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