FFMpeg kmsgrab record pixels wrong

Question

ffmpeg -f kmsgrab -i - -framerate 60 -vf 'hwdownload,format=bgr0' -preset ultrafast out.mkv

This is how a video frame should look like This is how it is recorded by ffmpeg https://drive.google.com/file/d/11jOUTk3ZxOfwnfd7zS4d4qBLApTS3Vmx/view?usp=sharing

Answer 1

Add the filter hwmap before the hwdownload. It should look something like this -vf 'hwmap=derive_device=vaapi,hwdownload,format=bgr0'.