[HELP] How is the video with color rec.709 change to rec.2100?

[shijan]

Filtering -> Vapoursynth -> Color-> Matrix -> TimeCube. Use bundled LUTs to transform one color space/gamma to another.

Note that Color Matrix filter is not the same as those LUTs and it don't transform color spaces/gammas. Color Matrix used for some special tasks when you upscale/downscale SD to HD content or similar...

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you can also generate your own transformation LUTs with LUTCalc tool https://cameramanben.github.io/LUTCalc/L...index.html