[FFmpeg-trac] #6832(undetermined:new): wrong duration when convert mp4

[FFmpeg]

#6832: wrong duration when convert mp4
-------------------------------------+-------------------------------------
             Reporter:  crazymxm     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 The output file has the double duration :
 Source video duration :00:01:58.88
 output  video duration :00:03:57.76

 （video's duration is  double ，audio's duration is correct. So， the
 video looks like played twice, with no sound in the second half ）

 {{{
 ./ffmpeg -i /Volumes/LANKEXIN/1383.mp4  out.mp4
 ffmpeg version N-82977-g8fd3e02-tessus Copyright (c) 2000-2016 the FFmpeg
 developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-
 version=tessus --enable-avisynth --enable-fontconfig --enable-gpl
 --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm
 --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
 --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-
 libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-
 libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-
 ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
   libavutil      55. 43.100 / 55. 43.100
   libavcodec     57. 70.100 / 57. 70.100
   libavformat    57. 61.100 / 57. 61.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 68.100 /  6. 68.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/LANKEXIN/1383.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42isom
     creation_time   : 2017-10-30T14:58:05.000000Z
     encoder         : mp4creator 1.6.1d
   Duration: 00:01:58.88, start: 0.000000, bitrate: 1918 kb/s
     Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 1280x720 [SAR 1:1 DAR 16:9], 1729 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
 (default)
     Metadata:
       creation_time   : 2017-10-30T14:58:05.000000Z
       encoder         : VC Coding
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 189 kb/s (default)
     Metadata:
       creation_time   : 2017-10-30T14:58:05.000000Z


 The output file ：
 localhost:Applications maxm$ ./ffmpeg -i /Volumes/LANKEXIN/out.mp4
 ffmpeg version N-82977-g8fd3e02-tessus Copyright (c) 2000-2016 the FFmpeg
 developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-
 version=tessus --enable-avisynth --enable-fontconfig --enable-gpl
 --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm
 --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
 --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-
 libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-
 libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-
 ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
   libavutil      55. 43.100 / 55. 43.100
   libavcodec     57. 70.100 / 57. 70.100
   libavformat    57. 61.100 / 57. 61.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 68.100 /  6. 68.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/LANKEXIN/out.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf57.61.100
   Duration: 00:03:57.76, start: 0.000000, bitrate: 1825 kb/s
     Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 1280x720 [SAR 1:1 DAR 16:9], 1729 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
 (default)
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 189 kb/s (default)
     Metadata:
       handler_name    : SoundHandler


 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6832>
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