A prepared Tamil-song video can be repeated with FFmpeg, published to MediaMTX over RTSP, and forwarded from MediaMTX to YouTube Live over RTMPS. The workflow moves the media between three stages; it does not give you permission to broadcast a recording.
Before configuring anything, confirm that the sound recording and the underlying music are cleared for the intended live broadcast. YouTube scans live streams for third-party content, and a licence may not prevent interruption unless the rights holder has also allowlisted your channel in Content ID.
Check music rights before setting up
A song file playing successfully on your computer is not evidence that you may rebroadcast it. Buying a download, subscribing to a music service, or crediting the singer or composer does not by itself establish broadcast rights. For Tamil music, permissions can concern distinct interests in the composition and in a particular sound recording. If you are unsure what your permission covers, check with the rights holder or a qualified adviser rather than treating a technical guide as legal advice.
YouTube states that “All live streams are scanned for matches to third-party content, including copyrighted content in the form of another live broadcast.” A match can lead to a warning, a placeholder image, interruption, or termination. YouTube also says that even where you have licensed third-party content, the owner may need to add your channel to its Content ID allowlist. Check YouTube’s guidance on copyright issues with live streams and confirm the current position with the rights holder before you schedule a broadcast.
Keep a record of what you have permission to use, which channel it covers, and any limits on territory, duration, or monetisation. Those details matter if you change channels, replace the recording, or leave the stream running beyond the period your permission covers. Do not assume that permission for a song automatically includes every recording of it.
If your plan is to use devotional songs, film music, independent releases, or a compilation, verify the relevant rights for the exact recordings in your file. A stream that begins without a claim can still be matched later. The steps below explain delivery only; they cannot prevent a rights claim or establish that a particular track is authorised.
How FFmpeg, MediaMTX, and YouTube fit together
FFmpeg reads and repeats the local media file, then publishes it to a named MediaMTX path over RTSP. MediaMTX receives that publication and forwards the path to YouTube’s current RTMPS ingest destination. YouTube then presents the incoming broadcast as a live stream through the channel’s Live Control Room.
In this arrangement, FFmpeg is the source publisher, MediaMTX is the relay, and YouTube is the destination. Keeping those roles separate helps you locate faults: if FFmpeg cannot publish, inspect the local file and RTSP connection; if MediaMTX receives the stream but YouTube does not, inspect the forwarding destination and the Live Control Room status.
MediaMTX’s FFmpeg documentation says, “The recommended way is acting as a RTSP client.” Its example uses FFmpeg as that client, publishing to an RTSP URL on the MediaMTX host. Its forwarding documentation shows a separate RTMPS destination for YouTube. Use the MediaMTX FFmpeg publishing guide and the MediaMTX stream forwarding guide as the current references for configuration details; examples can change as software and platform requirements change.
This is not the same as sending the file directly to YouTube from FFmpeg. MediaMTX sits between the publisher and the platform, so it can receive a named path and forward it onwards. That extra stage gives you a clear relay point, but it also adds configuration that you must monitor. If you do not need the relay and are comfortable publishing directly, a simpler workflow may suit you better; this article follows the MediaMTX route in the query.
Prepare a compatible media file
Start with one finished file that contains both the video and audio you intend to broadcast. It could be a still image or artwork paired with the song, but confirm that the file really has an audio stream as well as a video stream. MediaMTX warns that “YouTube requires streams to have both a video and an audio track.” A video-only publication may be silently rejected, so do not infer success from FFmpeg merely opening the file.
Check the file before starting a long run. Play it from beginning to end, listen for clipped or unexpectedly quiet audio, and inspect the transition from the last frame and sound back to the first. A loop command repeats the file; it does not edit the start and end to make them match. If a song ends with reverb or a sustained note, the return to its opening may be audible. A crossfade or other edit must be made in the media beforehand and checked in a player.
The documented command below uses stream copy (-c copy), which avoids re-encoding. That is useful when the original tracks and container are already suitable for the whole path, but it is not a conversion step. If you encounter a codec, timestamp, or container incompatibility, determine what the input contains and test an explicitly chosen remux or encode workflow. Do not add guessed encoder flags to a production command and assume that they solve every source-file problem.
YouTube’s RTMP/RTMPS guidance lists H.264 video, constant bitrate encoding, and AAC or MP3 audio. It recommends a two-second keyframe interval and says not to exceed four seconds. Those are platform recommendations, not a guarantee that every file will work. For details that affect your own content, compare the current YouTube encoder settings and bitrate guidance with your file and the output you plan to publish.
Loop and publish the file to MediaMTX over RTSP
MediaMTX’s documented FFmpeg example is:
ffmpeg -re -stream_loop -1 -i file.mp4 -c copy -f rtsp rtsp://localhost:8554/mystream
Replace file.mp4 with the path to your prepared file. The destination uses localhost because the example assumes FFmpeg and MediaMTX are reachable on the same machine; if they are on different machines, use the address reachable from the FFmpeg publisher instead. Keep the path name, here mystream, consistent with the path MediaMTX will forward.
The options have distinct jobs. -stream_loop -1 tells FFmpeg to repeat the input indefinitely. -re reads at the media’s natural rate rather than pushing the file as fast as the machine can process it. -i identifies the input, -c copy passes the existing audio and video streams through without transcoding, and -f rtsp selects RTSP publishing. The URL specifies the RTSP endpoint and path.
This command assumes that MediaMTX is running, accepts RTSP publishers, and is configured to receive the path. A connection refusal usually means that the host, port, service, or protocol configuration needs attention. A publisher may connect yet fail to produce a usable stream if the file has an unsupported track or timestamps. Start with a short test and review FFmpeg’s output rather than leaving a new configuration unattended overnight.
For a practical example of another continuous-playback approach, see the guide to streaming a YouTube playlist continuously with OBS Studio. OBS and this FFmpeg-to-MediaMTX route have different setup steps; the useful comparison is whether you want a graphical playlist workflow or a command-driven file publisher.
Configure the current YouTube RTMPS destination
Create or open the live broadcast in YouTube’s Live Control Room and obtain the ingest URL and stream key shown for that setup. Do this when configuring the stream, not by copying a URL or key from a tutorial, an old screenshot, or another account. YouTube can present values according to the current broadcast settings, and MediaMTX’s example host reflects what its documentation reported at the time it was written.
MediaMTX’s forwarding configuration illustrates a destination in the form rtmps://...#streamKey. The # separates the ingest URL from the key in that configuration. Follow the current MediaMTX syntax and substitute the URL and key supplied by your own Live Control Room. Treat the key as a credential: do not include it in a public article, screen recording, shared configuration file, or logs that others can access. If it is exposed, replace it through the account’s live settings.
Use RTMPS for this route. YouTube recommends RTMPS, which encrypts the connection in transit, and MediaMTX documents forwarding to a YouTube RTMPS destination. HLS is a separate ingestion mode, not a different URL to drop into the same RTMPS setup. YouTube’s HLS guidance involves an HTTPS destination, transport-stream segments, rolling playlists, and HTTP POST/PUT behaviour; it also disables the ultra-low-latency option. HLS can be relevant for cases such as HDR or codecs outside RTMP support, but the cited material does not provide a complete MediaMTX-to-YouTube HLS recipe for this task.
| Choice | What it means here | Trade-off to consider |
|---|---|---|
| RTMPS | The documented MediaMTX forwarding route, using the current URL and key from Live Control Room | Use output that fits YouTube’s RTMP/RTMPS codec guidance; verify the account’s current ingest details |
| HLS | A distinct YouTube ingestion protocol using HTTPS and segmented media | Requires HLS-compatible output and playlist behaviour; do not treat it as a direct substitute for the RTMPS configuration |
Before starting a sustained broadcast, confirm that the stream is attached to the intended YouTube event and channel. A correct MediaMTX path paired with a key from a different event can send media somewhere other than you expect. Keep the current destination in a private, controlled configuration and avoid putting a reusable key in a command history or a screenshot shared for troubleshooting.
Verify audio and video and test the stream
First confirm the local file has both tracks. Then start FFmpeg and check that it reports a successful RTSP publication without repeated connection or packet errors. Next, check MediaMTX’s view of the path and confirm that the stream is arriving. Finally, inspect the YouTube Live Control Room preview and stream health before you make the broadcast public or leave it unattended.
Do not treat a connected status as proof of a good programme. Listen for audio at the beginning and at the loop boundary, check that the image is present, and verify that sound remains in sync. A black picture, silence, or a delayed preview points to a different problem than an RTSP connection failure. The order of checks matters: establish that the source works before changing the relay, then establish that the relay works before changing the YouTube destination.
Choose an output bitrate that your measured upload capacity can sustain, leaving room for normal variation and other use on the connection. YouTube says, “We recommend running a speed test to test your upload bitrate.” Its published H.264 recommendations include 5 Mbps for 1080p30 and 8 Mbps for 720p30, which are examples of YouTube settings rather than universal targets. Do not simply choose a larger number because it appears in a table: the quality, frame rate, encoder output, and stable upload capacity all matter together.
Use the YouTube stream health indicators during a private or otherwise controlled test. If frames are dropped or the health status degrades, reduce competing network traffic and reassess whether the selected output fits the connection. If audio clips, a separate audio clipping troubleshooting guide can help distinguish an input-level issue from a delivery issue. Make one change at a time and check the result; changing bitrate, codec, and source file simultaneously makes diagnosis harder.
A first test should be long enough to hear at least one full loop boundary and confirm that the stream remains present, but do not infer overnight reliability from a brief preview. If you plan a 24/7 channel, test the actual file, event, and network conditions you will use. For a computer-based setup, the spare-PC checklist for 24/7 YouTube streaming covers a different operating model; this workflow still depends on the chosen machine or host continuing to run FFmpeg and MediaMTX.
Refresh ingest details and troubleshoot
Fetch the ingest destination and key from the current Live Control Room setup whenever you create or change a broadcast. Do not rely on a static ingest URL or assume that a key found in old notes still corresponds to the intended event. If a destination stops accepting the relay, revisit the current account screen and MediaMTX configuration rather than copying a URL from an old forum post.
When something fails, work from source to destination:
- FFmpeg cannot open the file: check the path, spelling, permissions, and whether the file plays locally. Confirm that the chosen file is the version you cleared for broadcast.
- FFmpeg cannot publish: verify that MediaMTX is running, that RTSP publishing is enabled, and that the host, port, and path match the service configuration. A localhost URL only works when that address resolves to the correct host from FFmpeg’s point of view.
- MediaMTX receives no usable tracks: inspect the input’s actual audio and video streams. A silent or video-only input is not made compliant by forwarding it.
- The local path works but YouTube does not preview it: check that the RTMPS URL and key came from the correct current Live Control Room event, and that the MediaMTX forward destination follows the documented format. Keep the key private while troubleshooting.
- YouTube preview appears but quality is poor: check upload capacity, stream health, output settings, and the media itself. Fix clipping or sync at its source where possible rather than assuming the relay is at fault.
If you change codecs or switch to HLS, revisit the entire output and destination configuration. YouTube’s HLS requirements include segments of 1–4 seconds and no more than five outstanding segments, along with rolling playlists. Those settings are specific to HLS and should not be transplanted into an RTMPS recipe. For continued RTMPS use, check YouTube’s current encoder guidance and retest after any material change.
A continuous stream needs attention even when the source file is static. Monitor the broadcast after launch, especially after changing the file, network, MediaMTX configuration, or YouTube event. Automated retries or a loop can help with repetition, but neither proves that a stream is audible, authorised, or reaching the intended audience.
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 loop an MP4 forever with FFmpeg?
Use -stream_loop -1 on the input, as in the command above. The command repeats the media file but does not create a seamless edit; listen to the transition between its end and beginning before using it live.
How do I send FFmpeg to MediaMTX?
Publish the file to an RTSP URL whose host, port, and path correspond to the MediaMTX configuration. The example uses localhost and mystream for illustration, so replace them where the publisher and MediaMTX are not on the same host or the configured path differs.
How do I forward a MediaMTX stream to YouTube Live?
Configure MediaMTX to forward the received path to the RTMPS destination shown by your current YouTube Live Control Room, with the matching stream key in the format MediaMTX documents. Do not use a static URL from a tutorial, and keep the key private.
Does this workflow give me permission to stream Tamil songs?
No. It explains how media can be looped and delivered, not whether you have broadcast rights. Confirm permission for the specific recording and intended use, and check whether the rights holder must allowlist your channel.