On Monday, January 17, 2022, Andrea paz via Cin <cin@lists.cinelerra-gg.org> wrote:
@Andrew
> @Andrea, for some reason I can't download attaches from forum (because I
have no login there?), can you add CMS.txt as attachment to email (again)?
I'm opening a new email because color has nothing to do with the
Vdpau/Vaapi issues.
It was just an attempt to put together all the information on how
CinGG treats color. Lately I found emails from Hermann Vosseler that
are very indicative. However, the fact remains that each plugins of
CinGG treats the color in its own way, so we should find a way to
understand how all the native plugins act, one by one (if I'm not
mistaken, the plugins of ffmpeg clip everything to 8-bit and sRGB).
Only with this information can we reconstruct a chain of steps that
accounts for color transformations and, perhaps, keep them under
control.
Sorry, I've been pushing too much color lately, it's best to let it go.
no problem, this is complex (and math intensive) problem, so re-visiting it from time to time hopefully provided some ideas/foundation for making it reality!
offtop: forum thread on colorsync in Final Cut Pro X (~2011)
Hermann already knew in 2012 that it was not possible to treat it in
CinCV and that's also why he went for Lumiera.