[FFmpeg-trac] #4000(undetermined:new): mpeg4: Magenta color shift in first GOP

[FFmpeg]

#4000: mpeg4: Magenta color shift in first GOP
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             Reporter:               |                    Owner:
  ErikCJohansson                     |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by ErikCJohansson):

 > How can I reproduce that frame 1 has a magenta colour shift?

 Depending on your display you can see the shift in the ramps when flipping
 between the frames. Looking at the histograms, you can see the shift in
 the higher range, but seems ok in the lower range. I will attach histogram
 plots of the source image as well as your two samples.

 Thanks

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Ticket URL: <https://trac.ffmpeg.org/ticket/4000#comment:2>
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