[FFmpeg-trac] #5806(undetermined:new): Major Brand & Minor Version

[FFmpeg]

#5806: Major Brand & Minor Version
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             Reporter:               |                     Type:  defect
  richardbushell                     |                 Priority:  normal
               Status:  new          |                  Version:
            Component:               |  unspecified
  undetermined                       |               Blocked By:
             Keywords:               |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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 We are getting conformance messages downstream after ffmpeg based on
 ffmpeg writing a spec prohibited value for Major Brand in MP4 files.

 'isom' cannot be used as a major brand in MP4, it is currently prohibited
 by ISO/IEC 14496-12 sec 6.3 paragraph 2.

 Also, it would be fantastic if you would extend the -brand option to
 include an option to override the minor version (as well as the major
 brand), like with the GPAC MP4Box option:
 -brand ABCD[:v]   sets major brand of file, with optional version

 Please advise, thanks.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5806>
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