[mgg6@smoky ffmpegbuild]$ ./bin/ffmpeg -acodec pcm_s16le  -i g_128k.wma out.wav
FFmpeg version SVN-r8932, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --prefix=/home/mgg6/Desktop/ffmpegbuild/ --enable-demuxer=asf --disable-encoders
  libavutil version: 49.4.0
  libavcodec version: 51.40.4
  libavformat version: 51.12.1
  built on May 13 2007 02:22:43, gcc: 3.4.6 20060404 (Red Hat 3.4.6-3)
Input #0, asf, from 'g_128k.wma':
  Duration: 00:00:30.2, start: 3.000000, bitrate: 136 kb/s
  Stream #0.0: Audio: wmav2, 44100 Hz, stereo, 128 kb/s
File 'out.wav' already exists. Overwrite ? [y/N] y
Output #0, wav, to 'out.wav':
  Stream #0.0: Audio: 0x0000, 44100 Hz, stereo, 1411 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Unsupported codec for output stream #0.0
[mgg6@smoky ffmpegbuild]$