[FFmpeg-trac] #4498(undetermined:new): Second Video is always corrupted when "concat demuxer" is used

[FFmpeg]

#4498: Second Video is always corrupted when "concat demuxer" is used
-------------------------------------+-------------------------------------
             Reporter:  muruganandh  |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:               |                  Version:  2.3.5
  undetermined                       |               Blocked By:
             Keywords:  concat       |  Reproduced by developer:  0
  demuxer tessus                     |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 % ffmpeg -f concat -i mylist.txt -c copy out.mp4

 mylist.txt has this inside :
 file 'part1.mp4'
 file 'part2.mp4'

 part1.mp4 is available here -
 https://www.dropbox.com/s/tcrds2xhmyb9b1a/part1.mp4?dl=0
 part2.mp4 is available here -
 https://www.dropbox.com/s/lr9drkitie4shl3/part2.mp4?dl=0

 Problem : After the videos are joined the second video is always corrupted

 Even if i change the order in mylist.txt to
 file 'part2.mp4'
 file 'part1.mp4'


 ffmpeg version 2.3.3-tessus Copyright (c) 2000-2014 the FFmpeg developers
   built on Aug 19 2014 20:44:45 with clang version 3.3
 (tags/RELEASE_33/final)
   configuration: --cc=/opt/local/bin/clang-mp-3.3
 --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus
 --disable-shared --enable-static --disable-ffplay --enable-gpl --enable-
 pthreads --enable-postproc --enable-libmp3lame --enable-libtheora
 --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid
 --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libxavs --enable-version3 --enable-
 libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm
 --enable-libopus --enable-libmodplug --enable-fontconfig --enable-
 libfreetype --enable-libass --enable-libbluray --enable-filters --disable-
 indev=qtkit --enable-runtime-cpudetect
   libavutil      52. 92.100 / 52. 92.100
   libavcodec     55. 69.100 / 55. 69.100
   libavformat    55. 48.100 / 55. 48.100
   libavdevice    55. 13.102 / 55. 13.102
   libavfilter     4. 11.100 /  4. 11.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 [concat @ 0x7fd3e380a000] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, concat, from 'mylist.txt':
   Duration: 00:00:00.02, start: 0.000000, bitrate: 11 kb/s
     Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x272
 [SAR 1:1 DAR 40:17], 698 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
     Stream #0:1: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp,
 127 kb/s
 File 'out.mp4' already exists. Overwrite ? [y/N] y
 Output #0, mp4, to 'out.mp4':
   Metadata:
     encoder         : Lavf55.48.100
     Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x272
 [SAR 1:1 DAR 40:17], q=2-31, 698 kb/s, 25 fps, 12800 tbn, 12800 tbc
     Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo,
 127 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 frame=104851 fps=30379 q=-1.0 Lsize=  426545kB time=01:09:54.07 bitrate=
 833.1kbits/s
 video:357594kB audio:65527kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.809105%
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4498>
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