[FFmpeg-devel] [PATCH] avformat/movenc: remove write_colr flag and write colr by default

[Michael Bradshaw]

The write_colr flag has been marked as "experimental, may be renamed or
changed, do not use from scripts" for over 5(!) years. I think it's time we
decide how to handle the colr atom.

I propose that we write the colr atom by default if the stream either has
an ICC color profile or has specified values for all of
color_primaries, color_trc, and color_space. Additionally, this stops
guessing the primaries/trc/matrix.

Please review.
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