[FFmpeg-trac] #11002(avformat:closed): Unnecessary PNG metadata generated

[FFmpeg]

#11002: Unnecessary PNG metadata generated
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             Reporter:               |                    Owner:  (none)
  MasterQuestionable                 |
                 Type:  enhancement  |                   Status:  closed
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:  invalid
             Keywords:  png          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 >Now we have 2 visually distinct images: in fact identical.

 If you assign 2.0 gamma to image of 2.4 gamma and go outside in the Sun
 you get the correct image again. Because 2.4 gamma is what you get when
 you are in dark room, 2.2 when in light office and 2.0 outside uner the
 sun when you film the videos.

 The same happens when you assign a ICC profile using iCCP chunk(s). Even
 in Photoshop — assign profile. It has Gamma 2.0 ICC too.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11002#comment:12>
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