Philip Langdale (2018-02-21): > Negotiation is part of Paul's larger changeset, and will be a useful > feature. My change is still a strict improvement over the current state > of the world - where range is not propagated at all, regardless of > compatibility. In those situations where negotiation is required, the > status quo will essentially continue, with the range value not > accurately reflecting the frame contents.
I am not comfortable with what you write here. I am afraid that adding negotiation on top of this would be more work than adding negotiation on top of the current code. I am also afraid that an incorrect value is worse than an unspecified one. But it all depends on what filters and codecs actually do with the color range, and that I do not know. Could you perhaps make a little summary of that issue: where the color range comes from, which filters and encoders do not care, which ones only work with one, which ones do something special with it? Maybe as a longer doxy comment for enum AVColorRange in libavutil/pixfmt.h? (Also, my mail contained "reply-to: ffmpeg-devel"; please heed it in the future.) Regards, -- Nicolas George
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