[FFmpeg-trac] #3473(avformat:open): wtv muxer does not check H.264 streams for startcode

[FFmpeg]

#3473: wtv muxer does not check H.264 streams for startcode
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             Reporter:  ramitbhalla  |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  minor        |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  wtv          |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  1            |
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Changes (by pross):

 * analyzed:  0 => 1


Comment:

 (Perhaps a better fault description would be "wtv muxer discards
 extradata, resulting in unplayable files")

 Analysis:
 The test file linked here (#3474.mp4) has H264 extradata containing
 startcode information, but the WTV muxer discards codec extradata when
 using -vcodec copy. The resulting file will not play back in FFmpeg or
 WMP.

 Solution:
 Will need to investigate whether/how the WTV format actually supports the
 extradata concept. And if not, insert the startcode information as a
 packet _or_ auto apply bitstream filter.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3473#comment:6>
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