WebRTC: SDP in Firefox with VP9 encoding

Question

I am not able to connect a call from Firefox to Firefox using VP9, allthough I have tried modifying the SDP in several different ways. I have a site similar to https://webrtc.github.io/samples/src/content/peerconnection/munge-sdp/, where I simply remove the unwanted codec. In Firefox, VP9 is not listed when I initiate the call. I have enabled VP9 on both sender and receiver, by setting media.mediasource.webm.enabled to true in about:config.

Does anybody know how to modify it correctly to get the call to go through, using VP9? I am running Firefox 47.0.1

https://stackoverflow.com/questions/64273530/webm-vp9-support-in-firefox says that it's not supported (anymore?). — Ben Bucksch, Feb 23 '21 at 04:06

Philipp Hancke · Accepted Answer · 2016-08-01T16:03:20.027

3

you need to add a boolean preference media.peerconnection.video.vp9_enabled that is set to true -- VP9 for WebRTC is still behind a flag in Firefox.

edited Aug 01 '16 at 16:03

answered Aug 01 '16 at 14:25

Philipp Hancke

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Thank you for the answer! Where do I find this preference? I cannot locate it in about:config – anters Aug 01 '16 at 14:46
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Never mind, i added a boolean value called `media.peerconnection.video.vp9_enabled` and set it to `true`. Thank you! – anters Aug 01 '16 at 14:56
clarified the answer ;-) – Philipp Hancke Aug 01 '16 at 16:03

WebRTC: SDP in Firefox with VP9 encoding

1 Answers1