[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):

 >That cannot be proved

 Of course it can. Internet <archive> remembers everything. From people
 wantinh to remove that chunk:
 https://stackoverflow.com/a/65880175/11173412

 People complaing about it back in 2006
 https://jonathannicol.com/blog/2006/12/01/fixing-png-gamma/


 https://hsivonen.fi/png-gamma/


 PNG people providing tests for this:
 http://www.libpng.org/pub/png/colorcube/colorcube-pngs-iCCP.html

 https://pmt.sourceforge.io/gamma_test/index.html


 Bugs still not fixed in png library that we do not use thankfully.
 https://github.com/pnggroup/libpng/issues/309
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Ticket URL: <https://trac.ffmpeg.org/ticket/11002#comment:6>
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