[FFmpeg-trac] #5178(avformat:new): isom cannot be a MAJOR BRAND in MP4 created from ffmpeg

[FFmpeg]

#5178: isom cannot be a MAJOR BRAND in MP4 created from ffmpeg
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             Reporter:               |                    Owner:
  richardbushell                     |                   Status:  new
                 Type:  defect       |                Component:  avformat
             Priority:  normal       |               Resolution:
              Version:  unspecified  |               Blocked By:
             Keywords:  mov          |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by richardbushell):

 MPEG-DASH conformance problems, and video players not knowing the correct
 ftyp.
 It should be mp42 not isom, as per the spec.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5178#comment:2>
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