[FFmpeg-trac] #7466(undetermined:open): scaled mjpeg movies from ProRes have lifted black

FFmpeg trac at avcodec.org
Sun Apr 30 20:27:20 EEST 2023


#7466: scaled mjpeg movies from ProRes have lifted black
-------------------------------------+-------------------------------------
             Reporter:  Brendan      |                    Owner:  (none)
  Bolles                             |
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by Balling):

 Checked with YUView, so black is 12 bit YUVA 0x100 (256), 0x800, 0x800
 (2048) and some value for A (YUView zoom box cannot show A), so yes, this
 is correct, 2048 is achromatic value for Cb, Cr and 256 for narrow range
 black Y.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7466#comment:3>
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