[FFmpeg-devel] avcodec/proresdec : add 12b decoding support

Martin Vignali martin.vignali at gmail.com
Sun Nov 18 23:49:39 EET 2018

> Are all 444(4?) Encodings 12-bit? Also is there a way to verify if your
> file should be decoded as 10 or 12-bit? Or does this code automate this
> detection?
The auto mode of the patch, only use codec_tag to switch between 10b and
12b, no other value.
I don't think, prores have metadata for encoding precision.

Apple doc say : 444 are 12b and 422 are 10b, so these value by default
seems reasonable to me,
even if the file is not encode with that precision (like using ffmpeg
prores_aw/ks encoder)


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