Yeah, hard coding NV12 was enough for my experiment.
zc-playlist-player is a nice piece of code, runs nicely here 9.6% ~ 15% cpu usage, mp4 HD files from 24fps to 60fps. If not asking too much, any chance (or planning) you have something about encoding raw H264 using cedar?
Not to mention you kms/drm code brought back my HDMI output on the CLI image with kernel 5.15.147-21-a733 → described here: A7S usb-c to hdmi issue