A question for any #digital #video experts out there... I'm confused as heck about the results from #libx265 (used via #ffmpeg, not the #x265 tool) regarding quality vs. preset and ratefactor.

I'm far from the first person to be confused by this, but I haven't found any real answers.

First I'll just show some analysis from some test encodes of a file; ssim and ratefactor numbers are coming from the CSV stats output of libx265.

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#quality #preset #ratefactor #CRF #encode #encoding