[FFmpeg-trac] #4753(undetermined:new): Wrong timestamps for G.729 in wav

[FFmpeg]

#4753: Wrong timestamps for G.729 in wav
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  minor      |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  g729
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 When decoding the sample from ticket #4577, many warnings are shown, the
 final output duration is wrong, should be 2:15.
 {{{
 $ ffmpeg -i 222.vd8 out.wav
 ffmpeg version N-74268-gf6518e5 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 30.100 / 54. 30.100
   libavcodec     56. 57.100 / 56. 57.100
   libavformat    56. 40.101 / 56. 40.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 32.100 /  5. 32.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.101 /  1.  2.101
   libpostproc    53.  3.100 / 53.  3.100
 [wav @ 0x24a41c0] ignoring wrong sample_count 135200
 [wav @ 0x24a41c0] Estimating duration from bitrate, this may be inaccurate
 Guessed Channel Layout for  Input Stream #0.0 : mono
 Input #0, wav, from '222.vd8':
   Duration: 00:02:15.20, bitrate: 8 kb/s
     Stream #0:0: Audio: g729 ([154]r[0][0] / 0x729A), 8000 Hz, 1 channels,
 s16, 8 kb/s
 Output #0, wav, to 'out.wav':
   Metadata:
     ISFT            : Lavf56.40.101
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 8000 Hz, mono,
 s16, 128 kb/s
     Metadata:
       encoder         : Lavc56.57.100 pcm_s16le
 Stream mapping:
   Stream #0:0 -> #0:0 (g729 (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 [output stream 0:0 @ 0x248f740] 100 buffers queued in output stream 0:0,
 something may be wrong.
 [wav @ 0x24d2720] Non-monotonous DTS in output stream 0:0; previous:
 32560, current: 80; changing to 32560. This may result in incorrect
 timestamps in the output file.
 [wav @ 0x24d2720] Non-monotonous DTS in output stream 0:0; previous:
 32560, current: 160; changing to 32560. This may result in incorrect
 timestamps in the output file.

 ...

 ...

 ...

 [wav @ 0x24d2720] Non-monotonous DTS in output stream 0:0; previous:
 35120, current: 6960; changing to 35120. This may result in incorrect
 timestamps in the output file.
 [wav @ 0x24d2720] Non-monotonous DTS in output stream 0:0; previous:
 35120, current: 7040; changing to 35120. This may result in incorrect
 timestamps in the output file.
 size=    2113kB time=00:00:04.40 bitrate=3933.2kbits/s
 video:0kB audio:2112kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.003606%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4753>
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