/opt/ffmpeg-svn/bin/ffmpeg -y -i /home/acme/Videos/Test.avi -vcodec h263 -s qcif -r 15 -b 200k  -ac 1 -ar 32000 -ab 64k-f 3gp /home/acme/Videos/Test3.3gp -cropleft 75 -cropright 75 -padtop 16 -padbottom 16 -async 1
FFmpeg version SVN-r19737, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --prefix=/opt/ffmpeg-svn --arch=x86_64 --cpu=core2 --enable-pthreads --enable-gpl --enable-postproc --disable-stripping --enable-libfaac --enable-nonfree --enable-libopencore-amrnb --enable-version3
  libavutil     50. 3. 0 / 50. 3. 0
  libavcodec    52.34. 0 / 52.34. 0
  libavformat   52.38. 0 / 52.38. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Aug 30 2009 20:59:24, gcc: 4.3.3
Input #0, avi, from '/home/acme/Videos/Test.avi':
  Duration: 01:51:46.16, start: 0.000000, bitrate: 1753 kb/s
    Stream #0.0: Video: mpeg4, yuv420p, 640x256 [PAR 1:1 DAR 5:2], 25 tbr, 25 tbn, 25 tbc
    Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s
[libopencore_amrnb @ 0x2213ab0]Only 8000Hz sample rate supported
Output #0, 3gp, to '/home/acme/Videos/Test3.3gp':
    Stream #0.0: Video: h263, yuv420p, 176x144 [PAR 45:22 DAR 5:2], q=2-31, 200 kb/s, 90k tbn, 15 tbc
    Stream #0.1: Audio: libopencore_amrnb, 32000 Hz, 1 channels, s16, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height