It's supported since late 2018 in the kernel, based on generic v4l2-requests interface. So anything that uses v4l2-requests should have video acceleration working. That should be all gstreamer based apps at the very least. Various codecs were gradually stabilized and moved to public API over the last few years.
There's no support in ffmpeg for v4l2-requests API, and nobody forward ported old Bootlin vaapi wrapper driver around v4l2-requests API to the stabilized public version of the API, yet. So app relying on these programs/interfaces don't get the acceleration, atm.
There's no support in ffmpeg for v4l2-requests API, and nobody forward ported old Bootlin vaapi wrapper driver around v4l2-requests API to the stabilized public version of the API, yet. So app relying on these programs/interfaces don't get the acceleration, atm.