[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>
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