ffmpeg -i %PATH3% -map 0:a -i video.mp4 -map 0:v -acodec copy -vcodec copy %output%.mp4


output

ffmpeg version N-65616-g7cdef77 Copyright (c) 2000-2014 the FFmpeg developers
  built on Aug 13 2014 23:17:18 with gcc 4.8.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
 --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
  libavutil      54.  3.100 / 54.  3.100
  libavcodec     56.  0.100 / 56.  0.100
  libavformat    56.  1.100 / 56.  1.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  0.100 /  5.  0.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  0.100 /  1.  0.100
  libpostproc    53.  0.100 / 53.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\BeSweet\out.m4a':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: M4A mp42isom
    creation_time   : 2014-08-31 23:07:21
    iTunSMPB        :  00000000 00000A40 00000040 0000000000270180 00000000 0000
0000 00000000 00000000 00000000 00000000 00000000 00000000
    encoder         : Nero AAC codec / 1.5.4.0
  Duration: 00:00:53.31, start: 0.000000, bitrate: 136 kb/s
    Chapter #0.0: start 0.054667, end 53.312000
    Metadata:
      title           :
    Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 13
4 kb/s (default)
    Metadata:
      creation_time   : 2014-08-31 23:07:21
      handler_name    : Sound Media Handler
Option map (set input stream mapping) cannot be applied to input file video.mp4
-- you are trying to apply an input option to an output file or vice versa. Move
 this option before the file it belongs to.
Error parsing options for input file video.mp4.
Error opening input files: Error number -22 occurred