Firefox, Chromium on Debian: WebRTC H.264 is not supported

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While trying to stream online with my friends, I had an issue where everyone else’s computer can watch the stream but mine, and even my android device can watch it.

I found this test page from GitHub Mozilla that revealed I don’t have H.264 support for WebRTC, while all my friends did.

  • I tested this on Firefox 112.0.1, both the Debian package firefox and the build from the official website.
  • I tested this on Chromium 112.0.5615.138 (Official Build) built on Debian 12.0, running on Debian 12.0 (64-bit) (provided by Debian package chromium).
  • I have installed libx264-160 and libx264-164.
  • I have installed libopenh264-7.
  • I can watch H.264 encoded videos offline with MPV and VLC.
  • ffmpeg -codec lists h264 support: DEV.LS h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10

Nearly all documents and SE questions about H.264 support for Firefox are dated from around 2014-2017, which I infer this means this is an old, solved issue. If that’s the case, why isn’t Firefox detecting support for H.264?

I use Debian Unstable (next release bookworm).

Read more here: Source link