[FFmpeg-trac] #6468(undetermined:new): ffmpeg doesn't maintain chapters when concatenating two MP4 files using the concat demuxer

FFmpeg trac at avcodec.org
Sun Jun 18 22:43:57 EEST 2017


#6468: ffmpeg doesn't maintain chapters when concatenating two MP4 files using the
concat demuxer
-------------------------------------+-------------------------------------
             Reporter:  whereswardy  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I'm trying to concatenate two MP4 files using the concat demuxer and want
 to retain the chapter markers that exist in both files so that the output
 file contains all the chapters from both of my input files. The source
 files contain chapter markers according to `mediainfo` which I want to be
 maintained in the output, but when using the `-map_chapters` option in
 ffmpeg they don't appear in the output file.

 I'm concatenating the following two files from `streams.txt`:

 {{{
 file 'episode2.mp4'
 file 'episode3.mp4'
 }}}

 which contain the following chapter/menu data (output cut down for
 brevity):

 {{{
 $ mediainfo episode2.mp4
 ...
 Menu
 ID                                       : 3
 Codec ID                                 : text
 Duration                                 : 22mn 25s
 Language                                 : English
 Encoded date                             : UTC 2017-06-18 15:27:40
 Tagged date                              : UTC 2017-06-18 15:27:40
 Bit rate mode                            : CBR
 00:00:00.000                             : Chapter 1
 00:00:59.720                             : Chapter 2
 ...
 }}}

 and I'm using the following ffmpeg command:

 {{{
 ffmpeg -f concat -safe 0 -i streams.txt -map_metadata 0 -map_chapters 0 -c
 copy output.mp4
 }}}

 however the output.mp4 file contains no chapter markers according to
 `mediainfo` and there's nothing viewable in any media player. I'm using
 ffmpeg 3.3.2 on Ubuntu 14.04.5:

 {{{
 $ ffmpeg -version
 ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
 built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
 configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg
 --mandir=/usr/share/man --enable-avresample --disable-debug --enable-
 nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb
 --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb
 --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264
 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-
 libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-
 libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-
 libvidstab --enable-libwavpack --enable-nvenc
 libavutil      55. 58.100 / 55. 58.100
 libavcodec     57. 89.100 / 57. 89.100
 libavformat    57. 71.100 / 57. 71.100
 libavdevice    57.  6.100 / 57.  6.100
 libavfilter     6. 82.100 /  6. 82.100
 libavresample   3.  5.  0 /  3.  5.  0
 libswscale      4.  6.100 /  4.  6.100
 libswresample   2.  7.100 /  2.  7.100
 libpostproc    54.  5.100 / 54.  5.100
 }}}

 {{{
 $ uname -a
 Linux server 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 12:18:55 UTC
 2017 x86_64 x86_64 x86_64 GNU/Linux
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6468>
FFmpeg <https://ffmpeg.org>
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