[FFmpeg-trac] #7163(avcodec:closed): 12-bit ProRes not supported
FFmpeg
trac at avcodec.org
Fri Apr 10 00:53:48 EEST 2020
#7163: 12-bit ProRes not supported
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Reporter: spookybathtub | Owner:
Type: enhancement | Status: closed
Priority: wish | Component: avcodec
Version: git-master | Resolution: fixed
Keywords: prores | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by pdr0):
Replying to [comment:20 spookybathtub]:
> Arri Meta Extract is not definitive proof. Neither is any other
metadata reading tool, because there is no "bit depth" metadata flag to
read in a ProRes QT. FFmpeg displays yuv422p10le not because it is
"detected", rather it's the pixel format we choose to decode.
I suppose it's not "definitive proof", but it's tagged fourcc "apch."
This is Prores HQ 422. I suppose someone might have hex edited it for
some reason, or a substituted a hacked firmware version in the camera, but
that's getting pretty far fetched .
The Prores white paper says Prores HQ supports 10bit. It does not
explicitly mention that 12 bit or 16 bit ''not'' supported by this
profile, but that's certainly implied. It also says Prores 4444 supports
up to 16bit , both RGB and YCbCr
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Ticket URL: <https://trac.ffmpeg.org/ticket/7163#comment:21>
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