Amazing progress as usual. It’s been fun watching just how much a few people can accomplish over the last few years despite working on sometimes unstable sand.

Yeah, you'll find out that va-api is not a good match for v4l2-requests. It does not pass decoded bitstream to the drivers as is, but pre-computes some things for some codecs, while v4l2-requests mostly expects original information parsed from the bitstream.

https://xff.cz/git/libva-v4l2_request/

Fantastic to see the progress and a fascinating detailed write-up.

You have to appreciate the effort Apple puts into security - goes some way to understanding why they won't endorse/support installing an alternative operating system.