Comment by ksec

Instead of 7th version older, their one was 6th?

x264 or x265 was basically never tuned for PSNR or SSIM what ever metrics. Basically the 30-40% AV1 claimed to be better in those value. And in that case, the x265 developer isn't wrong, it is very much the picture, not the values that matters.

VMAF should hopefully bring much more useful numbers. But we will have to see and put some time in since it is very new.