[FFmpeg-trac] #2333(undetermined:new): mkv + ac3 remux adds a little time

[FFmpeg]

#2333: mkv + ac3 remux adds a little time
-------------------------------------+-------------------------------------
             Reporter:  Squeeto      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 ffmpeg adds time to the muxed mkv and demuxed mkv:

 ffmpeg version N-50025-gb8bb661 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Feb 17 2013 02:37:45 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
 --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
 libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
 --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
   libavutil      52. 17.101 / 52. 17.101
   libavcodec     54. 91.103 / 54. 91.103
   libavformat    54. 63.100 / 54. 63.100
   libavdevice    54.  3.103 / 54.  3.103
   libavfilter     3. 38.100 /  3. 38.100
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100

 >ffmpeg -i input.mkv -i input.ac3 -map 0:0 -map 1:0 -vcodec copy -acodec
 copy -y done.mkv

 Input #0, matroska,webm, from 'input.mkv':
   Duration: 00:00:12.85, start: 0.000000, bitrate: 6039 kb/s

 Input #0, ac3, from 'input.ac3':
   Duration: 00:00:12.86, start: 0.000000, bitrate: 256 kb/s

 Input #0, matroska,webm, from 'done.mkv':
   Metadata:
     ENCODER         : Lavf54.63.100
   Duration: 00:00:12.93, start: 0.000000, bitrate: 6256 kb/s



 >ffmpeg -i done.mkv -an -vcodec copy -y demux.mkv

 >ffmpeg -i done.mkv -acodec copy -vn -y demux.ac3

 Input #0, matroska,webm, from 'demux.mkv':
   Metadata:
     ENCODER         : Lavf54.63.100
   Duration: 00:00:12.91, start: 0.000000, bitrate: 6008 kb/s

 Input #0, ac3, from 'demux.ac3':
   Duration: 00:00:12.86, start: 0.000000, bitrate: 256 kb/s

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2333>
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