On Apple Silicon, when a AV1 encoded video is played through Qt's MediaPlayer example console prints error which states that hardware acceleration is not supported on platform (the error is likely coming from FFmpeg).

You can reproduce the issue with the video attached and by using the media player demo (https://doc.qt.io/qt-6/qtdoc-demos-mediaplayer-example.html). 

Following Error is printed, This works good with ffplay 6.0.

[av1 @ 0x102605e80] Your platform doesn't support hardware accelerated AV1 decoding.
[av1 @ 0x102605e80] Failed to get pixel format.
[av1 @ 0x102605e80] Missing Sequence Header. 
[av1 @ 0x102605e80] Missing Sequence Header. 
[av1 @ 0x102605e80] Missing Sequence Header. 
....