On Mon, Jan 17, 2022, 10:44 AM 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.

In my case the flut3d plugin appears to use 32 bit float and the color space should be in the LUT.

I don't see color issues with it. Some other plugins result in bad banding, but I'm not sure I am using them correctly. More information about how color is used would be helpful. I'm try to determine a workflow with 10 bit f-log input and some version of 10 bit HDR output.

Regards,

Mark