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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
I had the exact same problem with an intel hd 3000 igpu (i5-2467), but then I lowered the framerate and it was mostly gone, albeit once or twice it bothered me with this image glitch.
The lower the framerate, the less errors = 15 fps was a good tradeoff I found ; 30fps was smoother but every minute or so I had some milliseconds lost.
