[FFmpeg-trac] #3197(avformat:new): Assertion nus->keyframe_pts[k] > last_pts failed when using "-f segment"

[FFmpeg]

#3197: Assertion nus->keyframe_pts[k] > last_pts failed when using "-f segment"
-------------------------------------+-------------------------------------
             Reporter:  ob           |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  nut crash    |               Blocked By:
  abort                              |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by ob):

 {{{~/git/ffmpeg/ffmpeg -i new_bad.vob -map 0:1 -map 0:13 -codec copy -f
 segment output-%08d.nut}}} seems to reproduce the problem consistently.
 It's crafted from the 298 first blocks of both VTS_01_0.VOB and
 VTS_01_1.VOB (each block being 2048 bytes). Hopefully this doesn't
 reproduce the problem for completely different reasons.

 {{{new_bad.vob}}} attached.

 {{{
 $ ~/git/ffmpeg/ffmpeg -i new_bad.vob -map 0:1 -map 0:13 -codec copy -f
 segment output-%08d.nut
 ffmpeg version N-58754-ge2bf00c Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Dec  5 2013 18:55:53 with gcc 4.8 (Ubuntu/Linaro
 4.8.1-10ubuntu9)
   configuration: --disable-stripping
   libavutil      52. 56.100 / 52. 56.100
   libavcodec     55. 45.100 / 55. 45.100
   libavformat    55. 22.100 / 55. 22.100
   libavdevice    55.  5.102 / 55.  5.102
   libavfilter     3. 91.100 /  3. 91.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
 Input #0, mpeg, from 'new_bad.vob':
   Duration: 00:00:02.01, start: 0.053622, bitrate: 3033 kb/s
     Stream #0:0[0x1bf]: Data: dvd_nav_packet
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg),
 720x576 [SAR 64:45 DAR 16:9], max. 7500 kb/s, 25 fps, 25 tbr, 90k tbn, 50
 tbc
     Stream #0:2[0x21]: Subtitle: dvd_subtitle
     Stream #0:3[0x20]: Subtitle: dvd_subtitle
     Stream #0:4[0x2a]: Subtitle: dvd_subtitle
     Stream #0:5[0x29]: Subtitle: dvd_subtitle
     Stream #0:6[0x28]: Subtitle: dvd_subtitle
     Stream #0:7[0x27]: Subtitle: dvd_subtitle
     Stream #0:8[0x26]: Subtitle: dvd_subtitle
     Stream #0:9[0x25]: Subtitle: dvd_subtitle
     Stream #0:10[0x24]: Subtitle: dvd_subtitle
     Stream #0:11[0x23]: Subtitle: dvd_subtitle
     Stream #0:12[0x22]: Subtitle: dvd_subtitle
     Stream #0:13[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
 Output #0, segment, to 'output-%08d.nut':
   Metadata:
     encoder         : Lavf55.22.100
     Stream #0:0: Video: mpeg2video, yuv420p, 720x576 [SAR 64:45 DAR 16:9],
 q=2-31, max. 7500 kb/s, 25 fps, 90k tbn, 25 tbc
     Stream #0:1: Audio: ac3, 48000 Hz, stereo, 192 kb/s
 Stream mapping:
   Stream #0:1 -> #0:0 (copy)
   Stream #0:13 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [segment @ 0x9703540] Non-monotonous DTS in output stream 0:0; previous:
 -3600, current: -3600; changing to -3599. This may result in incorrect
 timestamps in the output file.
 Assertion nus->keyframe_pts[k] > last_pts failed at
 libavformat/nutenc.c:598
 Aborted
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/3197#comment:14>
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