More likely this was a regression from bug 1932065, for similar reasons as bug 1944857 described in bug 1932065 comment 10: > AV1 is held to nightly, see bug 1944878. Probably this test needs to explicitly toggle the pref `media.webrtc.codec.video.av1.enabled` toggled to `true`, maybe here: https://searchfox.org/mozilla-central/rev/548b6981501f59e3c9f2f7851c013e7d53c4e72f/dom/media/webrtc/tests/mochitests/test_peerConnection_simulcastOffer.html#158-164
Bug 1944862 Comment 2 Edit History
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More likely this was a regression from bug 1932065, for similar reasons as bug 1944857 described in bug 1932065 comment 10: > AV1 is held to nightly, see bug 1944878. Probably this test needs to explicitly toggle the pref `media.webrtc.codec.video.av1.enabled` to `true`, maybe here: https://searchfox.org/mozilla-central/rev/548b6981501f59e3c9f2f7851c013e7d53c4e72f/dom/media/webrtc/tests/mochitests/test_peerConnection_simulcastOffer.html#158-164