[FFmpeg-trac] #948(avformat:open): No audio in output when the audio starts late in VOB file

FFmpeg trac at avcodec.org
Wed Aug 1 08:45:28 CEST 2012


#948: No audio in output when the audio starts late in VOB file
--------------------------------------+------------------------------------
             Reporter:  streamingguy  |                    Owner:
                 Type:  defect        |                   Status:  open
             Priority:  normal        |                Component:  avformat
              Version:  git-master    |               Resolution:
             Keywords:  mpegps        |               Blocked By:
             Blocking:                |  Reproduced by developer:  1
Analyzed by developer:  0             |
--------------------------------------+------------------------------------

Comment (by ski):

 I'm having the same problem with late audio. When I try to convert next
 VOB file from the same DVD there is no problem with audio.

 {{{
 $ ffmpeg -i VTS_11_1.VOB test.mp4
 ffmpeg version git-2012-07-31-52bd9cb Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Jul 31 2012 15:00:10 with gcc 4.6 (Ubuntu/Linaro
 4.6.3-1ubuntu5)
   configuration: --prefix=/home/test/20120731 --disable-doc --disable-
 network --disable-ffserver --enable-gpl --enable-version3 --enable-shared
 --enable-debug --disable-stripping --enable-pthreads --enable-runtime-
 cpudetect --enable-libtheora --enable-libvorbis --enable-libmp3lame
 --enable-libx264 --enable-libvpx
   libavutil      51. 66.100 / 51. 66.100
   libavcodec     54. 46.100 / 54. 46.100
   libavformat    54. 22.100 / 54. 22.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  5.101 /  3.  5.101
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [mpeg @ 0x170c240] max_analyze_duration 5000000 reached at 5000000
 Input #0, mpeg, from 'VTS_11_1.VOB':
   Duration: 00:18:32.25, start: 0.287267, bitrate: 7722 kb/s
     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR
 64:45 DAR 16:9], 9800 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x80]: Audio: ac3, 0 channels
     Stream #0:2[0x81]: Audio: ac3, 0 channels
     Stream #0:3[0x82]: Audio: ac3, 0 channels
     Stream #0:4[0x83]: Audio: ac3, 0 channels
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/948#comment:2>
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