ffmpeg 2.4.2 concatenate mp4 files

Question

I am trying to concatenate some mp4 files one after another. I execute the following:

ffmpeg -i concat:1.mp4\|2.mp4\|3.mp4\|4.mp4 -c copy final_output.mp4

But always get the message "[mov,mp4,m4a,3gp,3g2,mj2 @ 0x148d420] Found duplicated MOOV Atom. Skipped it"

Here is the output:

    ffmpeg version 2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  built on Oct  6 2014 17:33:05 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration: --prefix=/opt/ffmpeg --libdir=/opt/ffmpeg/lib/ --enable-shared --enable-avresample --disable-stripping --enable-gpl --enable-version3 --enable-runtime-cpudetect --build-suffix=.ffmpeg --enable-postproc --enable-x11grab --enable-libcdio --enable-vaapi --enable-vdpau --enable-bzlib --enable-gnutls --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libfaac --enable-libvo-aacenc --enable-nonfree --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfdk_aac --enable-libopus --enable-pthreads --enable-zlib --enable-libvpx --enable-libfreetype --enable-libpulse --enable-debug=3
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x148d420] Found duplicated MOOV Atom. Skipped it
    Last message repeated 2 times
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'concat:1.mp4|2.mp4|3.mp4|4.mp4':
  Metadata:
    encoder         : Lavf56.4.101
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
  Duration: 00:00:10.00, start: 0.000000, bitrate: 741 kb/s
    Stream #0:0(und): Video: h264 (High 4:2:2) (avc1 / 0x31637661), yuv422p, 640x480, 177 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Output #0, mp4, to 'final_output.mp4':
  Metadata:
    compatible_brands: isomiso2avc1mp41
    major_brand     : isom
    minor_version   : 512
    encoder         : Lavf56.4.101
    Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv422p, 640x480, q=2-31, 177 kb/s, 30 fps, 15360 tbn, 15360 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=  300 fps=0.0 q=-1.0 Lsize=     221kB time=00:00:09.90 bitrate= 183.0kbits/s    
video:217kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.995090%

As result I have output file, which contains the 1.mp4 only.

I heard about mp4 can not be concatenated without re-encoding. But actually I have this problem (Found duplicated MOOV Atom) for any format, which I tried (ts, mpg and etc.).

Please let me know what is wrong here. Because it seems like nobody has the same problem as me.

Thanks in advance.

Answer 1

You answer is correct, but not complete. The solution is to use a concat script, which it looks like you did. The "ffmpeg-sound.txt" in your answer will look something like this:

file 1.mp4
file 2.mp4
file 3.mp4
file 4.mp4

With that file, you provide it to ffmpeg as the input using the concat format:

ffmpeg -f concat -i ffmpeg-sound.txt -c copy final_output.mp4

Thank you for posting the solution. I hope this clarification of the input file format helps the next person.

Answer 2

I have found the solution, which works for me:

ffmpeg -f concat -i ffmpeg-sound.txt -c copy output-sound.mp4

It is pretty strange why the other ones didn't work, because it seems to me that this is almost the same.