#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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Changes (by Balling):
* status: new => closed
* resolution: => invalid
Comment:
>No use for most implementations.
Main implementations: Chrome, Gimp, Firefox support gAMA and cHRM. As for
CICP that is a future standard, that is needed for BT.709 transfer support
(very different from sRGB) and PQ HDR. Also gAMA needed for 2.2 vs sRGB.
Also image magik reads them.
Adobe Photoshop admits it is a bug that they do not read gAMA and cHRM.
Finally even if it was true that no code reads it, the PNG spec requires
to write fallback for ICC lrofiles and sRGB chunk, fallback being gAMA and
cHRM.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11002#comment:2>
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