[FFmpeg-trac] #3954(undetermined:new): Remuxing vorbis into AVI leads to very large files

[FFmpeg]

#3954: Remuxing vorbis into AVI leads to very large files
-------------------------------------+-------------------------------------
               Reporter:  ubitux     |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:  avi vorbis
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 Create a small OGG/Vorbis file:
 {{{
 ☭ ./ffmpeg -f lavfi -i sine -c:v libvorbis -t 100 out.ogg
 ffmpeg version N-66293-g5ddfac8 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Sep 16 2014 14:01:03 with gcc 4.9.1 (GCC)
   configuration: --enable-gpl --enable-libfribidi --enable-fontconfig
 --enable-libfreetype --enable-libx264 --enable-libvorbis --enable-
 libmp3lame --enable-libmodplug --enable-libass --assert-level=2
 --samples=/home/ux/fate-samples --cc='ccache cc'
   libavutil      54.  7.100 / 54.  7.100
   libavcodec     56.  1.100 / 56.  1.100
   libavformat    56.  4.101 / 56.  4.101
   libavdevice    56.  0.100 / 56.  0.100
   libavfilter     5.  1.100 /  5.  1.100
   libswscale      3.  0.100 /  3.  0.100
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  0.100 / 53.  0.100
 Input #0, lavfi, from 'sine':
   Duration: N/A, start: 0.000000, bitrate: 705 kb/s
     Stream #0:0: Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
 Output #0, ogg, to 'out.ogg':
   Metadata:
     encoder         : Lavf56.4.101
     Stream #0:0: Audio: vorbis (libvorbis), 44100 Hz, mono, fltp
     Metadata:
       encoder         : Lavc56.1.100 libvorbis
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le (native) -> vorbis (libvorbis))
 Press [q] to stop, [?] for help
 size=     170kB time=00:01:40.00 bitrate=  14.0kbits/s
 video:0kB audio:160kB subtitle:0kB other streams:0kB global headers:3kB
 muxing overhead: 6.276714%
 }}}

 Remux it to AVI:
 {{{
 ☭ ./ffmpeg -i out.ogg -c copy out.avi
 ffmpeg version N-66293-g5ddfac8 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Sep 16 2014 14:01:03 with gcc 4.9.1 (GCC)
   configuration: --enable-gpl --enable-libfribidi --enable-fontconfig
 --enable-libfreetype --enable-libx264 --enable-libvorbis --enable-
 libmp3lame --enable-libmodplug --enable-libass --assert-level=2
 --samples=/home/ux/fate-samples --cc='ccache cc'
   libavutil      54.  7.100 / 54.  7.100
   libavcodec     56.  1.100 / 56.  1.100
   libavformat    56.  4.101 / 56.  4.101
   libavdevice    56.  0.100 / 56.  0.100
   libavfilter     5.  1.100 /  5.  1.100
   libswscale      3.  0.100 /  3.  0.100
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  0.100 / 53.  0.100
 Input #0, ogg, from 'out.ogg':
   Duration: 00:01:40.00, start: 0.000000, bitrate: 13 kb/s
     Stream #0:0: Audio: vorbis, 44100 Hz, mono, fltp, 80 kb/s
     Metadata:
       ENCODER         : Lavc56.1.100 libvorbis
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf56.4.101
     Stream #0:0: Audio: vorbis (oV[0][0] / 0x566F), 44100 Hz, mono, 80
 kb/s
     Metadata:
       ENCODER         : Lavc56.1.100 libvorbis
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 size=   23610kB time=00:01:39.99 bitrate=1934.2kbits/s
 video:0kB audio:160kB subtitle:0kB other streams:0kB global headers:3kB
 muxing overhead: 14616.299805%
 }}}

 Compare sizes:
 {{{
 ☭ ls -l out.{ogg,avi}
 -rw-r--r-- 1 ux ux  24M Sep 16 14:04 out.avi
 -rw-r--r-- 1 ux ux 171K Sep 16 14:01 out.ogg
 }}}

 {{{out.avi}}} seems to play fine. I don't know if it's a regression.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3954>
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