[FFmpeg-trac] #3640(ffmpeg:new): A/V desync for a vob sample

[FFmpeg]

#3640: A/V desync for a vob sample
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:  ffmpeg
                Version:  git-       |               Keywords:  mpegps
  master                             |  regression
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.user/51659

 A user provided a sample to show issues with inverse telecine. The sample
 shows A/V desync (no matter if an inverse telecine filter is used or not)
 since 88956f73
 {{{
 $ ffmpeg -i long.sample.vob -qscale 2 -t 25 out.avi
 ffmpeg version N-63168-g30cdf38 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on May 15 2014 21:22:35 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      52. 83.100 / 52. 83.100
   libavcodec     55. 62.100 / 55. 62.100
   libavformat    55. 38.100 / 55. 38.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  5.100 /  4.  5.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 [mpeg2video @ 0x2324940] Invalid frame dimensions 0x0.
     Last message repeated 4 times
 Input #0, mpeg, from 'long.sample.vob':
   Duration: 26:24:22.10, start: 611.204267, bitrate: 17 kb/s
     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, smpte170m),
 720x480 [SAR 8:9 DAR 4:3], max. 9800 kb/s, 29.83 fps, 59.94 tbr, 90k tbn,
 59.94 tbc
     Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:2[0x81]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
     Stream #0:3[0x1bf]: Data: dvd_nav_packet
     Stream #0:4[0x20]: Subtitle: dvd_subtitle
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf55.38.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x480 [SAR
 8:9 DAR 4:3], q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc
     Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side),
 fltp, 448 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video -> mpeg4)
   Stream #0:1 -> #0:1 (ac3 -> ac3)
 Press [q] to stop, [?] for help
 [ac3 @ 0x232aa20] frame sync error
 Error while decoding stream #0:1: Invalid data found when processing input
 frame=  587 fps=0.0 q=2.0 Lsize=    5842kB time=00:00:25.02
 bitrate=1912.3kbits/s
 video:4440kB audio:1356kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.792863%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3640>
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