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Old 2nd January 2018, 00:35   #22  |  Link
dipje
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Join Date: Oct 2014
Posts: 268
zimg is the scaling library built into vapoursynth. So the vs.resize.xxxx functions are Z.Img routines. (And I used a lot of Vapoursynth's Resize docs in figuring out stuff for ffmpeg zscale filter :P).

So after using zimg / vs.resize to convert to linear RGB in floating point, you can tonemap with basic math in Python if you know the algorithm. The thread about it you're already active in: https://forum.doom9.org/showthread.php?t=174415
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