[FFmpeg-user] Requesting colormatrix advice

Michael Koch astroelectronic at t-online.de
Tue Nov 7 19:42:40 EET 2023

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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