Encoding av1 4k 10 bit videos have effect of added green tint to output video.

[Grzegorz-Rys]

Media Transcode Accelerator team noticed problem during encoding of 10bit yuv files (P010 format) with AV1 encoder.

JIRA report:
[VCX-967] [BM][AUX] Green tint on av1 4K 10 bit videos - https://jira.devtools.intel.com/browse/VCX-967

Test commands:
ffmpeg -hwaccel vaapi -init_hw_device vaapi=hw:/dev/dri/renderD128 -hwaccel_output_format vaapi -v verbose -f rawvideo -pix_fmt p010le -s:v 3840x2160 -r:v 30 -i /home/media_asset/yuv/4K_3840x2160_100frames.P010 -vf format=p010le,hwupload -an -c:v av1_vaapi -rc_mode CBR -g 100 -slices 1 -bf 3 -b:v 30000k -maxrate 30000k -vframes 30 -y logs/latest/tests/functional/av1/test_ffmpeg_encode.py::test_10bit[ffmpeg_vaapi_av1_encode_10bit_5].result.ivf

ffmpeg -hwaccel vaapi -init_hw_device vaapi=hw:/dev/dri/renderD128 -hwaccel_output_format vaapi -v verbose -f rawvideo -pix_fmt p010le -s:v 3840x2160 -r:v 30 -i /home/media_asset/yuv/4K_3840x2160_100frames.P010 -vf format=p010le,hwupload -an -c:v av1_vaapi -rc_mode CBR -g 100 -slices 2 -bf 3 -b:v 30000k -maxrate 30000k -vframes 30 -y logs/latest/tests/functional/av1/test_ffmpeg_encode.py::test_10bit[ffmpeg_vaapi_av1_encode_10bit_6].result.ivf

Result image:

We also created a patch for ffmpeg a few months ago (Dec 20, 2024) but without any reaction from community: https://patchwork.ffmpeg.org/project/ffmpeg/patch/20241220122334.246434-1-grzegorz.rys@intel.com/