[FFmpeg-trac] #6232(avformat:new): mpegts demuxer cannot get pkt->duration

[FFmpeg]

#6232: mpegts demuxer cannot get pkt->duration
-------------------------------------+-------------------------------------
             Reporter:  stevenliu    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mpegts       |               Blocked By:
  duration                           |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by stevenliu):

 Replying to [comment:5 heleppkes]:
 > Replying to [comment:4 stevenliu]:
 > > Replying to [comment:1 heleppkes]:
 > > > mpegts as a format just doesn't store a duration. There is no data
 to provide, so no data to show.
 > >
 > > No the audio duration can be get, but video cannot be get
 > >
 >
 > The demuxer provides the information thats stored directly in the file
 on a container level, and there is no duration there, it is not designed
 to extract the audio duration of every known audio codec. You'll get the
 audio duration after decoding.

 Let me try the other mpegts format:



 {{{
 localhost:flvenc liuqi$ ffprobe -show_packets -select_streams v
 ~/Movies/Test/M1.mpg |grep duration > the_other_mpegts_have_duration
 ffprobe version N-83692-gb8a7dcb Copyright (c) 2007-2017 the FFmpeg
 developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --enable-fontconfig --enable-gpl --enable-libass
 --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-
 libspeex --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-
 version3 --cc='ccache gcc' --enable-nonfree
   libavutil      55. 47.100 / 55. 47.100
   libavcodec     57. 81.100 / 57. 81.100
   libavformat    57. 66.102 / 57. 66.102
   libavdevice    57.  3.100 / 57.  3.100
   libavfilter     6. 74.100 /  6. 74.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, mpegts, from '/Users/liuqi/Movies/Test/M1.mpg':
   Duration: 00:05:06.21, start: 0.996322, bitrate: 1720 kb/s
   Program 2
     Stream #0:0[0x30]: Video: mpeg1video ([1][0][0][0] / 0x0001),
 yuv420p(tv), 352x240 [SAR 200:219 DAR 880:657], 1500 kb/s, 29.97 fps,
 29.97 tbr, 90k tbn, 29.97 tbc
     Stream #0:1[0x31]: Audio: mp2 ([3][0][0][0] / 0x0003), 44100 Hz,
 stereo, s16p, 128 kb/s
 }}}


 I have try the other mpegts, it's can get duration;


 the attechment file name : the_other_mpegts_have_duration.txt

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6232#comment:6>
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