[FFmpeg-trac] #1582(swscale:open): Banding/discoloration in darker gradients when converting to rgb24

[FFmpeg]

#1582: Banding/discoloration in darker gradients when converting to rgb24
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             Reporter:  y3kcjd5      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  swscale
              Version:  git-master   |               Resolution:
             Keywords:  swscale,     |               Blocked By:
  bounty                             |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by cehoyos):

 Replying to [comment:9 11rcombs]:
 > "ffmpeg -ss <time> -i <10bit_h264_file> -vframes 1 -pix_fmt rgb24
 out.png" produces output with no discernible image-wide discoloration as
 compared to the same cmdline without the -pix_fmt, and the amount of
 banding in the image is comparable to that in the same frame downsampled
 using ImageMagick.

 Could you test the following?
 {{{
 $ ffmpeg -ss <time> -i <10bit_h264_file> -vframes 1 -sws_flags
 +full_chroma_int -pix_fmt rgb24 out.png
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/1582#comment:11>
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