[FFmpeg-trac] #3345(swscale:open): Bias in planar YUV to YUV bit depth conversion

FFmpeg trac at avcodec.org
Tue Sep 7 21:50:17 EEST 2021

#3345: Bias in planar YUV to YUV bit depth conversion
             Reporter:  abc123      |                    Owner:  (none)
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  swscale
              Version:  git-master  |               Resolution:
             Keywords:  bounty      |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
Comment (by pdr0):

 @Balling - this is an 8 year old ticket

 OP claims that issue isn't present with libav swscale. You get bit
 identical results with libav. Libav dithers by default too. I tested libav
 binaries from 2018 and 2014. I couldn't find older binaries. Maybe it
 didn't dither back then.

 avconv -pix_fmt yuv420p10le -s 1280x720 -i testGrad_01.yuv -pix_fmt
 yuv420p -f rawvideo testGrad_02avconv.yuv
Ticket URL: <https://trac.ffmpeg.org/ticket/3345#comment:10>
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