On Sun, Apr 17, 2016 at 9:21 PM, Reimar Döffinger <reimar.doeffin...@gmx.de> wrote: > In particular, I have an uncomfortable suspicion that > PGS might be designed to match the movie's colour space, > in which case neither variant would give correct results > but instead it would have to depend on what format the > corresponding video track uses (and it probably would > be more than just the 255/224 factor that would differ).
Yes, the YCbCr values in palettes are matched accordingly against the video stream. As per the specification: "Y, Cr and Cb shall have the same color matrix as the associated HDMV Video stream: 525-60/625-50 (Rec.601); 1080i, 720p (ITU-709)" Otherwise the specification notes that valid values in palettes are: -Y: 16-235 -Cr: 16-240 -Cb: 16-240 -Transparency: 0-255, where a value of ‘255’ indicates full opacity and ‘0’ indicates full transparency. (Each Palette entry shall have a default transparency value of 0; the default values of Y, Cr and Cb are undefined.) Best regards, Jan Ekström _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
