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Netflix / vmaf

Perceptual video quality assessment based on multi-method fusion.
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Low VMAF #899

Closed andini2807 closed 2 years ago

andini2807 commented 3 years ago

https://user-images.githubusercontent.com/47917100/130665888-8bd7bc1f-f8ae-4dbf-a45e-597e6c946668.mp4

Hello, I have an issue trying to get the VMAF score of an 1920x1080 10 seg, 30 fps video. I used this command for encoding: vvencapp -i Football.yuv -s 1920x1080 -c yuv420 -r 30 --preset medium --qp 31 --qpa 0 -ip 64 -t 4 -o Football_vvc_qp31.266 This one for decoding: vvdecapp -b Football_vvc_qp31.266 -o Football_vvc.yuv and this one to get the VMAF: vmaf -r Football.yuv -d prueba.yuv -w 1920 -h 1080 -p 420 -b 8 and I get a VMAF of 6 points. Just to check I encoded the Football_vvc.yuv file with h264 and the video had 20 seconds duration and horrible quality. What I am doing wrong? Thank you.

li-zhi commented 3 years ago

A ususal suspect is frame misalignment. Have you checked if Football.yuv and prueba.yuv are aligned? A simple way to test this out is the vooya player (using the Difference->Diff against option).