[FFmpeg-trac] #6869(avcodec:new): h264_mp4toannexb only inserts SPS/PPS in front of IDR frames

[FFmpeg]

#6869: h264_mp4toannexb only inserts SPS/PPS in front of IDR frames
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             Reporter:  mkver        |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avcodec
              Version:  unspecified  |               Resolution:
             Keywords:  h264         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 >consider a H.264 track whose SPS/PPS are only transmitted out of band and
 that doesn't have IDR frames, but only I frames with recovery point SEI
 messages as keyframes

 Well, such a frame is not a valid stream per the spec. Each stream should
 start with IDR. Anyway, I see nowadays it is almost always inserted.
 Like...
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Ticket URL: <https://trac.ffmpeg.org/ticket/6869#comment:2>
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