Quote:
Originally Posted by WorBry
I did record the libvmaf and ffmpeg PSNR scores also, but they are not as interesting.
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Actually they are quite interesting.
PSNR scores obtained with the VapourSynth VMAF filter:
60 is the maximum score, achieved only with the lossless x264 CRF=0 encodes.
And the equivalent ffmpeg PSNR results:
I excluded the CRF=0 encode results because ffmpeg-PSNR reports lossless as Infinity (Inf).
The libvmaf PSNR scores are in general a little lower than the ffmpeg PSNR scores but show the same overall pattern. The 1080/50p series encodes gave higher bit-matched SSIM scores than the 2160/50p series at the higher bit/pixel range but at the lower end (< 24bits/pixel), that is reversed. Interesting also that the libvmaf PSNR metric gives wider separation of the x264 and x265 scores in the higher bit/pixel domain.