this sample file is WMV3/WMAPro
windows media player 11 plays this file smoothly
latest ffplay plays it very un-smoothly.

ffmpeg version details follow:

FFmpeg version SVN-r20091, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  built on Sep 30 2009 04:03:48 with gcc 4.2.4
  configuration: --enable-shared --disable-static --enable-memalign-hack --prefix=/mingw --cross-pre
 --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libmp3lame --enable-libopenjpeg --
  libavutil     50. 3. 0 / 50. 3. 0
  libavcodec    52.36. 0 / 52.36. 0
  libavformat   52.39. 0 / 52.39. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libswscale     0. 7. 1 /  0. 7. 1