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Old 21st September 2014, 22:16   #14  |  Link
sneaker_ger
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Join Date: Dec 2002
Posts: 5,565
Because of psy both x264 and x265 developers suggest using "--tune psnr" if you want to compare psnr. The psy optimizations increase subjective quality but reduce quality of metrics such as psnr and ssim.

But again: same crf does not result in same quality between 264 and x265.
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