[FFmpeg-trac] #3686(undetermined:new): ffprobe returns incorrect duration

FFmpeg trac at avcodec.org
Fri May 30 03:08:53 CEST 2014


#3686: ffprobe returns incorrect duration
-------------------------------------+-------------------------------------
             Reporter:  hxuanyu      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 the test video has 7 streams, both ffmpeg-2.0.1 and latest git header
 select v:4 and a:5

 ffprobe built from latest returns:
   Duration: 26:30:50.12, start: 44036.917489, bitrate: 1 kb/s
 ffprobe 2.0.1 returns:
   Duration: 00:00:07.10, start: 39848.510611, bitrate: 17980 kb/s

 using av_rescale(pFormatCtx->streams[i]->duration,
 pFormatCtx->streams[i]->time_base.num,
 pFormatCtx->streams[i]->time_base.den) to calculate the duration,

 ffprobe 2.0.1  shows v:4 has invalid duration

 Video [0].length =  7
 Audio [1].length is AV_NOPTS_VALUE
 Audio [2].length is AV_NOPTS_VALUE
 Audio [3].length =  7
 Video [4].length is AV_NOPTS_VALUE
 Audio [5].length is AV_NOPTS_VALUE
 Audio [6].length =  7
 Video [7].length =  7
 Audio [8].length is AV_NOPTS_VALUE
 Audio [9].length is AV_NOPTS_VALUE
 Audio [10].length = 6

 ffprobe latest shows v:4 has a duration of 95450 seconds

 Video [0].length = 7
 Audio [1].length is AV_NOPTS_VALUE
 Audio [2].length = 6
 Audio [3].length = 7
 Video [4].length = 95450
 Audio [5].length is AV_NOPTS_VALUE
 Audio [6].length = 7
 Video [7].length = 7
 Audio [8].length is AV_NOPTS_VALUE
 Audio [9].length is AV_NOPTS_VALUE
 Audio [10].length = 6

 But in fact the actual duration should be 7 seconds so what ffprobe latest
 returns is not correct.

 the test video is here
 https://dl.dropboxusercontent.com/u/89678527/aaaaaaaavvv_mpeg2video_30_yuv420p_dar4x3_sar10x11_ac3_48000_1_0.ts

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Ticket URL: <https://trac.ffmpeg.org/ticket/3686>
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