Color reproduction issues

I tested VEAI for color fidelity.
I used the Avisynth script, which created RGB, RGB64, YUV420, etc. clips from a standard MP4 file with basic colors.
I used Chronos filter 30->60fps. ProRes output.
Each resulting file had slightly changed colors, the worst in the case of RGB.
Why is this happening? I understand a slight color change, but here the result was different depending on the color space used, even though the colors were the same.


3 posts were merged into an existing topic: Colorspace mismatch?