[FFmpeg-user] Concatenating two audio files

[Stuart Bruce]

Hello

I've been trying to get FFmpeg to concatenate two audio files together,
based on the top answer from this forum:
http://superuser.com/questions/587511/concatenate-multiple-wav-files-using-single-command-without-extra-file

Although I believe I've replicated the winning answer, I can't seem to work
out what the correct syntax is to make it work.

My log output (original parameters and console output) is below. For
security I've had to change all the actual file paths to '********' but all
the paths and files are valid.

I'm hoping somebody could point me to the problem, which I'm hoping is
something as simple as having a quote mark out of place or something like
that. Any help would be very much appreciated.

Thanks

Stuart


FFmpeg process log.
Started: 31/07/2014 11:45:59
exe:
C:\Users\Stuart\*******\FFmpeg\ffmpeg.exe
Arguments:
-i
"C:\Users\Stuart\AppData\*********\cache\310714_3Vc1AQqWBXtqimH5Sj1j.wav"
-i
"C:\Users\Stuart\AppData\**********\cache\310714_bGhog6vOWMmn8x4J8ADz.wav"
-filter_complex '[0:0][1:0]concat=n=2:v=0:a=1[out]' -map [out]
"C:\Users\Stuart\******\s-tk-220-00200.wav"
FFmpeg output:
ffmpeg version N-53868-gc51654f Copyright (c) 2000-2013 the FFmpeg
developers
  built on Jun  6 2013 03:00:45 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
--enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid
--enable-zlib
  libavutil      52. 35.100 / 52. 35.100
  libavcodec     55. 15.100 / 55. 15.100
  libavformat    55.  8.102 / 55.  8.102
  libavdevice    55.  2.100 / 55.  2.100
  libavfilter     3. 75.101 /  3. 75.101
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
Guessed Channel Layout for  Input Stream #0.0 : mono
Input #0, wav, from
'C:\Users\Stuart\*****************\cache\310714_3Vc1AQqWBXtqimH5Sj1j.wav':
  Metadata:
    encoder         : Lavf55.8.102
  Duration: 00:00:04.18, bitrate: 705 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
s16, 705 kb/s
[wav @ 00353400] max_analyze_duration 5000000 reached at 5015510
microseconds
[wav @ 00353400] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #1.0 : stereo
Input #1, wav, from
'C:\Users\Stuart\**********\cache\310714_bGhog6vOWMmn8x4J8ADz.wav':
  Duration: 00:00:05.20, bitrate: 1411 kb/s
    Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
[AVFilterGraph @ 0035bd80] No such filter:
'[0:0][1:0]concat=n=2:v=0:a=1[out]'
Error configuring filters.