[FFmpeg-trac] #3825(avformat:new): Wrong PTS in Ogg Vorbis file

[FFmpeg]

#3825: Wrong PTS in Ogg Vorbis file
--------------------------------------+----------------------------------
               Reporter:  Cigaes      |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avformat
                Version:  git-master  |               Keywords:
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+----------------------------------
 With the attached file, the Ogg demuxer gives the following timestamps:
 {{{
 packet|pts=20032|duration=1024
 packet|pts=21056|duration=1024
 packet|pts=22528|duration=128
 packet|pts=22656|duration=128
 }}}

 Notice that 21056 + 1024 = 22080 ≠ 22528.

 For the same file, {{{oggz-dump}}} shows:

 {{{
 00:00:00.454: serialno 1746078464, calc. gpos 20032, packetno 23: 1 byte
 00:00:00.477: serialno 1746078464, calc. gpos 21056, packetno 24: 1 byte
 00:00:00.500: serialno 1746078464, calc. gpos 22080, packetno 25: 1 byte
 00:00:00.513: serialno 1746078464, calc. gpos 22656, packetno 26: 1 byte
 }}}

 0.500 ≈ 22080/44100

 Full {{{ffprobe}}} output (probably useless):

 {{{
 $ ./ffprobe_g -of compact -show_entries packet=pts,duration ~/va2.ogg
 ffprobe version N-65207-g7a8f8c6 Copyright (c) 2007-2014 the FFmpeg
 developers
   built on Aug  3 2014 16:24:06 with gcc 4.9 (Debian 4.9.1-1)
   configuration: --enable-shared --disable-static --enable-gpl --enable-
 libx264 --enable-libopus --enable-libass --enable-libfreetype --enable-
 opengl --assert-level=2
   libavutil      52. 94.100 / 52. 94.100
   libavcodec     55. 71.100 / 55. 71.100
   libavformat    55. 50.100 / 55. 50.100
   libavdevice    55. 13.102 / 55. 13.102
   libavfilter     4. 11.102 /  4. 11.102
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, ogg, from '/home/cigaes/va2.ogg':
   Duration: 00:00:00.76, start: 0.000000, bitrate: 93 kb/s
     Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp, 128 kb/s
     Metadata:
       track           : 5
       ALBUM           : XXXXXXXXXXXXXXXXXXXX
       ARTIST          : XXXXXXXXXX
       ARTIST_JA       : XXXXXXXXXXXXXXX
       TITLE           : XXXXXXXXX
 packet|pts=-128|duration=128
 packet|pts=0|duration=576
 packet|pts=576|duration=1024
 packet|pts=1600|duration=1024
 packet|pts=2624|duration=1024
 packet|pts=3648|duration=1024
 packet|pts=4672|duration=1024
 packet|pts=5696|duration=1024
 packet|pts=6720|duration=1024
 packet|pts=7744|duration=1024
 packet|pts=8768|duration=1024
 packet|pts=9792|duration=1024
 packet|pts=10816|duration=1024
 packet|pts=11840|duration=1024
 packet|pts=12864|duration=1024
 packet|pts=13888|duration=1024
 packet|pts=14912|duration=1024
 packet|pts=15936|duration=1024
 packet|pts=16960|duration=1024
 packet|pts=17984|duration=1024
 packet|pts=19008|duration=1024
 packet|pts=20032|duration=1024
 packet|pts=21056|duration=1024
 packet|pts=22528|duration=128
 packet|pts=22656|duration=128
 packet|pts=22784|duration=128
 packet|pts=22912|duration=128
 packet|pts=23040|duration=128
 packet|pts=23168|duration=128
 packet|pts=23296|duration=128
 packet|pts=23424|duration=128
 packet|pts=23552|duration=128
 packet|pts=23680|duration=576
 packet|pts=24256|duration=1024
 packet|pts=25280|duration=1024
 packet|pts=26304|duration=1024
 packet|pts=27328|duration=1024
 packet|pts=28352|duration=1024
 packet|pts=29376|duration=1024
 packet|pts=30400|duration=1024
 packet|pts=31424|duration=1024
 packet|pts=32448|duration=1024
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3825>
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