Streaming a video file instead of webcam

[imrilu]

I'm trying to establish a WebRTC connection between 2 peers and stream a video file instead of a webcam stream. Currently I'm able to establish a connection with a webcam stream without a problem, but I need the capability to also stream a video (in mp4/mkv/etc, various format support will also be very helpful).
I've searched all over this Issues board and did find a comment that Alex said it's doable. I'd like to know if it's something small that I can fork and maybe build myself, and if so what is the general idea for one to do such a thing?

Thanks

[stserakhau]

I solved this point via jmuxer and streaming audio & video (h264) via datachannel

[devopvoid]

This is work in progress.

[dannyxu2015]

This is work in progress.

any progress about this?

[stserakhau]

I think this feature will not to be implemented inside webrtc project and should be marked as out of scope. This feature is partially implemented inside banalytics.live project. https://banalytics.live/ ***@***.*** File media stream source [image: image.png] вт, 23 апр. 2024 г. в 11:12, Danny Xu ***@***.***>:

…

This is work in progress. any progress about this? — Reply to this email directly, view it on GitHub <#77 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABGKG34ZV3ACY2SP3PFWG33Y6YQZVAVCNFSM52B5BI2KU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBXGE4DAOBUGUZQ> . You are receiving this because you commented.Message ID: ***@***.***>

-- Best regards, Siarhei Tserakhau CTO, Banalytics https://banalytics.live ***@***.*** https://www.linkedin.com/pulse/configure-your-safety-banalytics-banalytics-live https://www.facebook.com/Banalytics

[devopvoid]

I think this feature will not to be implemented inside webrtc project and
should be marked as out of scope.

This feature will be implemented!

[devopvoid]

This is possible today without waiting on the in-progress module below. CustomVideoSource is built exactly for this — decode your video file with any Java video library (or your own decoder), convert each frame to I420, and push it via CustomVideoSource.pushFrame(). See docs/guide/video/custom-video-source.md, which lists "video files" as one of the intended sources and walks through creating the source, wiring it into a VideoTrack, and pushing NativeI420Buffer frames. This is the same mechanism people already use for things like the SRS/WHEP frame-receive path elsewhere in this repo.

On the more turnkey solution I referred to in my July 2025 comment: I've started scaffolding an FFmpeg-based media module (webrtc-java-media) to decode files (and other formats) directly without the caller having to bring their own decoder, but it's still early — the module skeleton and FFmpeg submodule are there, no Java/native implementation yet, and it isn't wired into the Maven build. So still in progress, not abandoned, just not ready yet.

Leaving this open until that module ships, but for anyone who needs this now, CustomVideoSource is the way to go.