dom/media/test/test_mediarecorder_webm_support.html passes. test_mediarecorder_record_addtracked_stream stalls [after](https://searchfox.org/mozilla-central/rev/15f758f06d97ee3c4e382b174836395442c38f71/dom/media/test/test_mediarecorder_record_addtracked_stream.html#176) "Audio content ok" and "Frame: 0 IsPixel ref=255,0,0,255 threshold=128 value=0,0,0,0".
Bug 1875201 Comment 3 Edit History
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dom/media/test/test_mediarecorder_webm_support.html passes. test_mediarecorder_record_addtracked_stream stalls [after](https://searchfox.org/mozilla-central/rev/15f758f06d97ee3c4e382b174836395442c38f71/dom/media/test/test_mediarecorder_record_addtracked_stream.html#176) "Audio content ok" and "Frame: 0 IsPixel ref=255,0,0,255 threshold=128 value=0,0,0,0". Edit: this fails locally even --without-system-libvpx, so this seems to be a separate issue.