[FFmpeg-trac] #3638(avformat:closed): ffmpeg converting mp4 with h.264 to avi - no video in WMP

FFmpeg trac at avcodec.org
Fri May 23 18:42:13 CEST 2014

#3638: ffmpeg converting mp4 with h.264 to avi - no video in WMP
             Reporter:  ramitbhalla  |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:  fixed
             Keywords:  avi h264     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Changes (by cehoyos):

 * keywords:  avi => avi h264
 * status:  new => closed
 * resolution:   => fixed


 No, I had not completely understood the issue myself originally, sorry.
 H.264 can be muxed in different ways. WMP supports H.264 in avi only with
 fourcc H264 which indicates a H.264 elementary stream with startcodes
 (while fourcc avc1 indicates a stream without startcodes). So only if you
 choose fourcc H264 startcodes have to be present. This will be enforced in
 a commit later today.

 If you use another fourcc than H264 for H.264 video, WMP will not play the
 resulting file. So far, we believe that other fourccs are also valid and
 that there is nothing about this that can be fixed within FFmpeg.

Ticket URL: <https://trac.ffmpeg.org/ticket/3638#comment:17>
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