[FFmpeg-trac] #978(undetermined:new): wrong container fps when muxing raw Xvid to avi

[FFmpeg]

#978: wrong container fps when muxing raw Xvid to avi
-------------------------------------+-------------------------------------
             Reporter:  Selur        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  m4v avi fps  |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I got a small m4v file (Xvid;
 http://www.multiupload.com/S9CJO31ED4]small.m4v) and I want to mux into an
 .avi container.

 ffmpeg reports it as:
 Stream #0:0: Video: mpeg4 (Advanced Simple Profile), yuv420p, 720x576 [SAR
 64:45 DAR 16:9], 25 fps, 25 tbr, 1200k tbn, 25 tbc


 Problem is when I remux it with:
 ffmpeg -y -i "D:\Encoding Output\small.m4v" -vtag xvid -vcodec copy -map
 0:0 -f avi "D:\Encoding Output\small.avi"

 ffmpeg reports:
 Input #0, m4v, from 'D:\Encoding Output\small.m4v':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: mpeg4 (Advanced Simple Profile), yuv420p, 720x576
 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 1200k tbn, 25 tbc
 Output #0, avi, to 'D:\Encoding Output\small.avi':
   Metadata:
     ISFT            : Lavf53.29.100
     Stream #0:0: Video: mpeg4 (xvid / 0x64697678), yuv420p, 720x576 [SAR
 64:45 DAR 16:9], q=2-31, 25 fps, 50 tbn, 50 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 frame=  664 fps=  0 q=-1.0 Lsize=    2195kB time=00:00:26.54 bitrate=
 677.5kbits/s
 video:2158kB audio:0kB global headers:0kB muxing overhead 1.718484%

 and the resulting container fps flag is set to 50fps, not 25 fps;
 even when I use:
 ffmpeg -y -r 25 -i "D:\Encoding Output\small.m4v" -vtag xvid -vcodec copy
 -map 0:0 -r 25 -f avi "D:\Encoding Output\small.avi"

 I still end up with 50fps in the container,... :/

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/978>
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