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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsYou can run MediaMTX as an Ubuntu systemd service and forward a live audio-and-video stream to YouTube over RTMPS. The service can start at boot, but that alone does not guarantee a 24/7 broadcast: the Ubuntu host, network, stream source and YouTube connection must all remain available. This guide covers the relay setup and the checks needed before relying on it unattended. YouTube’s current ingest URL and stream-key settings can vary, so use the values shown in your own YouTube Studio account.
How the setup works
MediaMTX is the relay on your Ubuntu host: a source publishes a stream to it, and MediaMTX forwards that stream to YouTube. MediaMTX describes itself as a ready-to-use, zero-dependency media server and proxy; it can also serve a stream when its publisher is offline, if the relevant stream is available to it. See the MediaMTX introduction.
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For a YouTube live stream, the forwarded output needs both audio and video. A video-only stream may be silently rejected by YouTube, according to MediaMTX’s YouTube forwarding guidance.
What you need before setup
- An Ubuntu host using systemd, with a reliable power source and network connection.
- The MediaMTX executable and a configuration file appropriate to the current release. Check the configuration reference for the version you install; the documented reference may change over time.
- A source that can publish a working audio-and-video stream to MediaMTX. MediaMTX documents publishing with FFmpeg, including looping a file in real time, in its FFmpeg publishing guide.
- Access to YouTube Studio for the channel’s current live-stream settings, ingest URL and stream key. Confirm that live streaming is available for your account and check current YouTube Help requirements; the requirements and values applicable to an individual channel should not be assumed from an old example.
Install MediaMTX and create the systemd service
MediaMTX’s Linux boot guide gives a global-path pattern: place the executable under /usr/local/bin/, its YAML configuration under /usr/local/etc/, and define a systemd unit that starts the executable with that configuration. Follow the guide for the current release and adapt filenames and paths to your installation: Start MediaMTX on boot (Linux).
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The example unit in that guide uses this command:
ExecStart=/usr/local/bin/mediamtx /usr/local/etc/mediamtx.ymlIt also sets WantedBy=multi-user.target. Use the complete unit-file example from the official guide rather than creating a partial service definition. The guide recommends enabling systemd-networkd-wait-online.service so startup can wait for network initialization. That recommendation may need adapting to the network manager actually used by your Ubuntu installation.
- Install the current MediaMTX executable and configuration using the official guide’s instructions. Verify the release and paths before copying commands, since project files and versions can change.
- Create the systemd unit using the guide’s full example, with
ExecStartpointing to the executable and configuration at your chosen paths. - Reload systemd’s unit definitions, then enable and start the service. The guide’s sequence uses
systemctl daemon-reload,systemctl enable mediamtxandsystemctl start mediamtx. Enabling configures boot startup; starting runs the service now. - Check
systemctl status mediamtxand inspect the service journal for startup errors. Confirm that the service is active and reading the intended configuration before configuring the YouTube handoff.
Configure MediaMTX to forward to YouTube
In YouTube Studio, open the channel’s current live-stream settings and copy the ingest URL and stream key shown there. Configure MediaMTX’s forwarding destination from those current values, using the RTMPS pattern described in the MediaMTX forwarding guide. Do not assume an example endpoint in a guide is still the correct endpoint for your channel.
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Treat the stream key like a password: keep it out of screenshots, public repositories and any logs or configuration you share. Store and restrict access to the configuration file accordingly.
Make sure the incoming source is publishing to the MediaMTX path that your forwarding configuration expects. MediaMTX’s publishing documentation covers supported publishing methods; its FFmpeg guide shows examples of publishing to local RTMP and RTSP paths and looping an input file in real time.
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Test the complete stream before leaving it unattended
- Start the source and confirm it is publishing to the expected MediaMTX path.
- Check MediaMTX service status and logs for connection or configuration errors.
- Open the YouTube live control room and verify that the preview and stream status show an incoming broadcast.
- Confirm the source has both an audio track and a video track. MediaMTX specifically warns that YouTube requires both and may silently reject video-only streams.
- Test a service restart and a source reconnect while someone can observe the YouTube preview. Confirm the source and forwarding path recover as expected before depending on the system unattended.
What “24/7” requires in practice
Systemd can start MediaMTX on boot, and MediaMTX can serve always-available streams while a publisher is offline. These are useful building blocks, not an uptime guarantee for the Ubuntu machine, its power, network route, source process or YouTube ingest. MediaMTX’s documentation describes authentication, recording, metrics and performance monitoring features, but those features do not constitute a service-level agreement or prove uninterrupted delivery to YouTube; see the project introduction.
- Plan for host reboots and outages, including how you will regain access if the service fails to start.
- Monitor both the MediaMTX service and YouTube’s live status; a running local service does not by itself prove YouTube is receiving the broadcast.
- Check the source separately. A relay cannot forward media that is not being published or otherwise made available to it.
- For a rented Ubuntu VPS or dedicated server, compare bandwidth and outbound-transfer terms, the route to the ingest endpoint selected in YouTube Studio, restart and monitoring controls, and your ability to maintain Ubuntu. A hosting provider does not by itself guarantee continuous delivery.
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