[FFmpeg-trac] #2684(undetermined:new): Black becomes dark gray when converting rgb24 to gray

[FFmpeg]

#2684: Black becomes dark gray when converting rgb24 to gray
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             Reporter:  b_jonas      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by cehoyos):

 Reproducible with:
 {{{
 $ ffmpeg -f lavfi -i color=black -vframes 1 black.bmp
 $ ffmpeg -i black.bmp -pix_fmt gray -f rawvideo black.raw
 }}}
 Works better with FFmpeg 0.5.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2684#comment:1>
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