Am 07.11.2023 um 18:23 schrieb Phil Rhodes via ffmpeg-user:
So let me get this straight. There's a command line option called colorspace. There's a filter called colorspace which has options including "space," "trc" (meaning "transfer characteristics") and "primaries," as well as several other options which do not actually have anything to do with colourspace. There's a filter called setparams which has options including “color_primaries,” “color_trc” (meaning “colour transform” this time) and “colorspace.” This filter is known to be buggy. Several other filters (including scale and zscale) have options to set input and output colour spaces, which might complicate things further. Interactions between all of this are not documented anywhere. Has it occurred to anyone that this is getting a bit out of hand, and regardless the knowledge level of the user, it creates a situation where things are likely to be the wrong colour?
That's a good summary of the current state. I did also try to understand this stuff some time ago, without success.
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