Multiple issues

[serg]

Okay, found the culprit of the matrix issue. Due to a typo Hybrid sometimes used PC709 instead of PC.709, so that should fix the DeSpot issue.
Strange thing is for me Vapoursynth by default uses LWLibavSource unless 'Prefer LWLibAVSource over FFmpegSource2' is disabled instead of ffms2.

# current color space: YUV444P16, bit depth: 12, resolution: 1920x1080, fps: 25, color matrix: 709, yuv luminance scale: limited, scanorder: progressive
# Loading F:\TestClips&Co\files\ProRes\AlexaCafe709_ProRes4444.mov using LWLibavSource
clip = core.lsmas.LWLibavSource(source="F:/TestClips&Co/files/ProRes/AlexaCafe709_ProRes4444.mov", format="YUV444P16", cache=0, prefer_hw=0)

I also found some code that forces FFMS2 instead of LWLibavSource for ProRes when 'Prefer LWLibAVSource over FFmpegSource2' is disabled. (iirc this was since LSMASHSource couldn't handle ProRes files, but FFMS2 could)

-> I'll do some testing whether LSMASHSource can handle high bit ProRes nowadays

Cu Selur

Yes, LSMASHSource handles high bit ProRes. I've already tested and it works fine