For simple REC601 to REC709 no need to use HDRTools, the simple integrated avs functions are enough.
Otherwise, this is the proper script line.
Maybe you can try to add Output=1 in ConvertYUVtoXYZ, or, convert to 16 bits before ConvertYUVtoXYZ (and after convert down to 8 bits).
Last edited by jpsdr; 19th October 2019 at 10:38.
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