Sorry Phyllis, I have tried to follow the various posts about ffmpeg color problems, but I can't figure out how it works. I get the impression that even the ffmpeg developers are not clear on how to handle color in their program. I tried reading Poynton's excellent book, recommended by Andrew, a couple of years ago but stopped early because it was beyond my capabilities. There are too many variables, beyond the problems of ffmpeg: lack of color management (which I think all reduces to an initial transcode to the absolute X,Y,Z color space from which then the program could do all the transformations it needs without too much loss of color info), lack of support for ICC profiles, not knowing how each and every function and plugin of CinGG treats colors, interaction between CinGG and ffmpeg, and who knows what else. As Adam said, “There is no color management workflow.” It is no coincidence that colorimetry in editing programs is found only in the big, rich, specialized companies.