$ ffmpeg -formats | grep wmv3
FFmpeg version SVN-r6002, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --enable-pthreads --enable-amr_nb --enable-amr_wb --prefix=/usr/local 
  libavutil version: 49.0.0
  libavcodec version: 51.11.0
  libavformat version: 50.5.0
  built on Aug 15 2006 22:08:36, gcc: 4.0.1 (Apple Computer, Inc. build 5341)
 D V    wmv3