[FFmpeg-trac] #2084(undetermined:new): Wrong duration and negative bitrate in mpeg stream with timestamp discontinuity

[FFmpeg]

#2084: Wrong duration and negative bitrate in mpeg stream with timestamp
discontinuity
-------------------------------------+-------------------------------------
             Reporter:  cehoyos      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  mpegps       |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by cehoyos):

 The negative bitrate is not shown anymore, the duration is still
 incorrect, ticket #2894 probably describes the same issue.
 {{{
 $ ffmpeg -i negative-bitrate-sample.mpg -f null -
 ffmpeg version N-55734-g9e477a3 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Aug 23 2013 19:36:08 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 42.100 / 52. 42.100
   libavcodec     55. 29.100 / 55. 29.100
   libavformat    55. 14.102 / 55. 14.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 82.102 /  3. 82.102
   libswscale      2.  5.100 /  2.  5.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, mpeg, from 'negative-bitrate-sample.mpg':
   Duration: 00:00:01.06, start: 0.287267, bitrate: N/A
     Stream #0:0[0x1bf]: Data: dvd_nav_packet
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR
 64:45 DAR 16:9], max. 8400 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:3[0x23]: Subtitle: dvd_subtitle
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf55.14.102
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x576
 [SAR 64:45 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
     Stream #0:1: Audio: pcm_s16le, 48000 Hz, 5.1(side), s16, 4608 kb/s
 Stream mapping:
   Stream #0:1 -> #0:0 (mpeg2video -> rawvideo)
   Stream #0:2 -> #0:1 (ac3 -> pcm_s16le)
 Press [q] to stop, [?] for help
 [mpeg2video @ 0x3142ee0] warning: first frame is no keyframe
 [null @ 0x3142340] Encoder did not produce proper pts, making some up.
 [mpeg2video @ 0x3142ee0] warning: first frame is no keyframe
 [mpeg @ 0x3140880] New subtitle stream 0:4 at pos:20676622 and
 DTS:27.2873s
 [mpeg @ 0x3140880] New subtitle stream 0:5 at pos:82606094 and
 DTS:106.967s
 [mpeg @ 0x3140880] New subtitle stream 0:6 at pos:82792462 and
 DTS:107.127s
 frame=95478 fps=1922 q=0.0 Lsize=N/A time=01:03:39.12 bitrate=N/A
 video:8951kB audio:2148228kB subtitle:0 global headers:0kB muxing overhead
 -100.000001%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2084#comment:1>
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