To stream to YouTube with MediaMTX and FFmpeg on Windows, treat the setup as separate publishing hops: a source sends media to a MediaMTX path, then MediaMTX forwards that path to YouTube. FFmpeg can be the source publisher or a separate forwarding process when you need to transform media; it is not automatically required at both hops.
This is a configuration approach assembled from the documented roles of MediaMTX, FFmpeg and YouTube Live, not a claim that this exact Windows workflow has been tested end to end. Use the current stream-specific destination shown in YouTube Live Control Room, and verify Windows paths, executable names and network rules on your own machine.
Map the source, relay and destination
A useful way to avoid confusion is to name each hop before opening a terminal. The source might be OBS, a camera encoder, or FFmpeg reading a file. It publishes to a named path on MediaMTX, such as mystream. MediaMTX can then forward that path to the ingest destination YouTube gives you for the event.
In the simplest relay arrangement, OBS publishes to MediaMTX over RTMP and MediaMTX forwards the path to YouTube over RTMPS. The two destinations are different: the source encoder points at your MediaMTX host and path; MediaMTX's forwarding configuration points at YouTube's current ingest URL and stream key. A YouTube watch-page URL is for viewers and is not an ingest destination.
FFmpeg has two distinct possible jobs. It can publish a file or other supported input into MediaMTX, using the MediaMTX RTMP path, or it can act as a forwarding/transcoding stage if your format, filters or protocol needs call for it. If OBS already sends a suitable stream to MediaMTX, do not add FFmpeg just because the title contains FFmpeg. Each extra process adds another place to configure and diagnose.
Think of the path as a hand-off, not a video file being copied to a page. The source must produce media, MediaMTX must accept the publication on the intended path, and the forwarder must reach the correct YouTube event. For a 24/7 channel, also decide whether the source itself is continuous: a one-off file publisher may stop when playback ends unless configured to loop. The guide to making a random song playlist for a 24/7 YouTube radio channel covers a different content-planning question, but the same distinction between continuous content and a continuous connection matters here.
Create the YouTube event and copy its destination
Create or schedule the live stream in YouTube Live Control Room. The destination details are associated with that event: copy the stream URL and stream key displayed there. If you intend to use encryption, reveal and copy the RTMPS URL specifically. YouTube may show an ordinary RTMP URL by default; do not assume it is the same destination with only a label changed.
YouTube's live streaming setup guidance explains the stream setup process. The exact URL and key shown for your event are authoritative on publishing day. MediaMTX's forwarding example also warns that its sample YouTube endpoint reflected the value reported when its documentation was updated, so do not treat a sample endpoint copied from a guide as permanent.
A stream key is a credential: anyone with it may be able to send content to that event. Keep it out of public screenshots, source repositories and shared chat. If you think it has been exposed, replace or reset it in the Live Control Room and update the forwarding configuration accordingly. A key is not a substitute for the event's destination URL; both pieces must match.
Run MediaMTX on Windows
Download a Windows build from the MediaMTX project and follow the instructions packaged with that release. The documentation used here does not settle every Windows-specific installation, firewall or command-line detail, so treat generic examples as configuration guidance rather than guaranteed copy-and-paste Windows commands. Confirm the executable name, working directory and file path syntax for the build you actually have.
MediaMTX is controlled by a YAML configuration file. The project's configuration documentation describes configuration and validation, including a general validation form such as ./mediamtx --validate-conf=/path/to/mediamtx.yml. That syntax is shown as general documentation, not as a tested PowerShell invocation. On Windows, check the packaged executable's supported command syntax and quote paths containing spaces; then validate the configuration before relying on it.
The service needs to be reachable by the source publisher. If OBS or FFmpeg runs on the same computer, a local address and the configured RTMP listener may be sufficient. If another computer publishes to it, the host address, network route and firewall rules become relevant. Open only the required access for your setup, and check the MediaMTX listener settings and Windows firewall policy rather than guessing a port from a tutorial.
A successful MediaMTX process start proves only that it launched; it does not prove YouTube is receiving a signal. Keep a record of the path name, source address, destination URL type and where the key is configured, without recording the key itself. This small map makes it easier to isolate whether a failure is at the local publishing hop or at the upstream forward.
Publish a source to a MediaMTX path
Choose one source publisher. In OBS, set the output destination to the MediaMTX address and the chosen path. In a simple local arrangement, the RTMP address may look like rtmp://localhost:1935/mystream, but the address and listener must agree with your MediaMTX configuration. Use your actual host and path, not the example name if you configured something else.
MediaMTX documents FFmpeg publishing with a command of this shape:
ffmpeg -re -stream_loop -1 -i file.mp4 -c copy -f flv rtmp://localhost:1935/mystream
This example reads a file in real time, loops it, copies its encoded streams without re-encoding, and sends FLV over RTMP to the local MediaMTX path. It illustrates the publishing hop; it does not prove that every file is compatible, nor that the Windows executable and path syntax on your machine match the example exactly. Consult the MediaMTX FFmpeg publishing guide and test with your own input.
If you are using OBS, FFmpeg is not needed for this first hop unless you have a specific reason to make it the publisher. If you are using FFmpeg for a file, check that the file has the audio and video tracks you expect before publishing. Copying streams avoids a generation step but also means the source's codec, frame rate and track layout remain as they are. If the source is unsuitable for YouTube, changing only the destination URL will not fix it.
Do not confuse a path name with a stream key. mystream identifies the MediaMTX path in the example; the YouTube key belongs to the later forwarding destination. A common practical error is to send the source straight to the wrong endpoint, or to configure the local publisher and upstream forward as if they shared one URL. Test the source-to-MediaMTX hop independently before diagnosing YouTube.
Decide whether FFmpeg should publish or forward
Native MediaMTX forwarding is the shorter route when the stream on a path is already suitable for the destination and the required protocol is supported. MediaMTX documents a path-level forwarding destination that includes RTMPS and a stream key. That keeps the roles clear: OBS or FFmpeg publishes into MediaMTX, and MediaMTX forwards the path onwards.
Use FFmpeg as a separate forwarder when the outgoing stream needs transcoding, filtering, or a protocol that native forwarding does not support. This adds a process and an additional media hand-off. You must then decide which input FFmpeg reads, what output it creates, and where that output is sent; avoid accidentally creating a loop in which output returns to the same path that feeds the process.
| Choice | When it fits | Main trade-off |
|---|---|---|
| MediaMTX native forwarding | The path's media is already acceptable and the destination protocol is supported | Fewer moving parts, but less opportunity to alter the media |
| FFmpeg forwarding | You need to transcode, filter, or bridge a protocol requirement | More control, but another process and another point to monitor |
| FFmpeg as source publisher | A file or input is being sent directly into a MediaMTX path | Convenient for a file-based source; compatibility still depends on the input |
Keep the distinction explicit in your notes and configuration. If you only need to forward a compatible stream, transcoding may consume extra machine capacity without solving a real problem. If you do need to change codecs or filter a source, confirm FFmpeg's output has both required tracks and the intended timing before proceeding to YouTube.
Configure the YouTube RTMPS destination
For native forwarding, configure the MediaMTX path's forwarding destination using the current RTMPS URL and stream key from Live Control Room. MediaMTX's forwarding documentation shows the pattern and separates the URL and key with # in its dest entry. Use that syntax as a reference for the version and configuration format you are running; substitute the actual current destination, not a sample endpoint from the page.
YouTube recommends RTMPS, the encrypted extension to RTMP. Its encoder settings guidance covers protocol and encoder requirements. If YouTube reports an SSL error, first confirm that the URL begins with rtmps and exactly matches the current Live Control Room value. YouTube's help guidance notes that specifying port 443 may help for an SSL error, but use the URL and port supplied for your stream rather than changing ports speculatively.
If using FFmpeg as the outgoing forwarder instead, configure its output for the RTMPS destination and the stream key in the form expected by the chosen command and protocol. Do not place a real key into a public script or post it while asking for help. The correct command details depend on the input and the FFmpeg build, so verify the output protocol and escaping on the machine where you run it; this Windows article does not claim a complete tested command for every configuration.
Only one final publisher should normally be aimed at a given YouTube event at a time. If both MediaMTX native forwarding and an FFmpeg forwarder are started for the same path and key, they can compete or create confusing status. Choose one downstream route, then check that the source publisher still targets the MediaMTX path rather than the YouTube destination directly.
Check media quality and reconnect behaviour
YouTube requires both video and audio tracks; MediaMTX's documentation says video-only streams are silently rejected. This is why a stream can appear to leave the source without becoming a usable YouTube live signal. Inspect the source and the outgoing encoding for both tracks before troubleshooting relay settings. If the content is intentionally quiet, an audio track still needs to be present.
YouTube's current encoder guidance supports RTMP/RTMPS and lists H.264, H.265 or AV1 video, AAC or MP3 audio, CBR, and frame rates up to 60 fps. It recommends a two-second keyframe interval and says not to exceed four seconds. As one published example, YouTube lists 1080p at 30 fps with H.264 at a 5 Mbps minimum and 14 Mbps recommended. These are YouTube guidance figures accessed in 2026, not a promise that a particular home connection can sustain them. Choose from YouTube's current encoder settings and bitrate guidance for the actual resolution and frame rate.
The upload connection needs headroom for a steady stream, not just a brief speed-test result. Test while using the intended network, and watch YouTube's stream health with representative motion and audio. A static devotional image may encode differently from a moving local news loop; test the material you will actually broadcast. For a local connection comparison, the 1080p bitrate guide for Airtel Xstream Fiber can help frame the question, but your own sustained upload result and YouTube's current table should govern the setting.
Test reconnects deliberately before treating the arrangement as unattended. Stop and restart the source publisher, then observe whether MediaMTX accepts the path again and whether the YouTube event resumes or needs intervention. Also consider what happens if the Windows PC restarts, loses network access, or the file reaches its end. MediaMTX documents configuration reload where possible and a validation option, but that alone is not a complete Windows service-recovery plan.
For a channel expected to stay live overnight, your main risk may be the PC, power or internet link rather than the relay syntax. A spare desktop can be a sensible choice when you need control over a local input or want to operate the encoder yourself; a managed cloud workflow can remove the need to leave that computer running for a file-based broadcast. StreamNeo removes the specific burden of keeping your own computer on for an uploaded-video stream, while you still provide the YouTube stream key and check the channel and content yourself. The comparison of a spare desktop and cloud streaming costs is useful when deciding which operating burden you prefer.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
How do I stream to YouTube with MediaMTX and FFmpeg on Windows?
Use a source publisher such as OBS or FFmpeg to send media to a MediaMTX path, then configure either MediaMTX or a separate FFmpeg process to forward the stream to YouTube's current RTMPS destination. Treat this as a configuration approach, not a tested end-to-end Windows recipe, and check the Windows build's paths and commands.
Where do I get my YouTube stream key?
Create or schedule the event in YouTube Live Control Room and copy the stream URL and key shown for that stream. Reveal the RTMPS URL if you want the encrypted destination, and keep the key private.
Why is YouTube not receiving my stream?
Check each hop separately: the source must publish to the right MediaMTX path, the path must be forwarded to the current ingest URL, and the event key must match. Then inspect connection status, audio/video tracks and YouTube stream health; do not use the watch-page URL as an ingest address.
Why does YouTube reject a video-only stream?
YouTube requires an audio track as well as video, and MediaMTX's guidance says video-only streams are silently rejected. Check the source and outgoing stream for both tracks, even when the programme itself is mostly visual.