Great DirectShow decoding filter for decompressing DIVX movies, picture postprocessing ffdshow is a set of DirectShow filters and VFW codec for
video compression, decompression and processing and
audio compression and processing.
You can play almost any movie using ffdshow.
FFDShow uses libavcodec from ffmpeg project or for video decompression (it can use xvid.dll installed with xvid codec too), postprocessing code from mplayer to enhance visual quality of low bitrate movies, and is based on original DirectShow filter from XviD, which is GPL'ed educational implementation of
mpeg4 encoder.
Here are some key features of "FFDShow MPEG
video decoder":
fast video decompression using optimized
mmx, SSE and 3DNow! code
support for different codecs: XviD, all DivX versions, MS WMV, MPEG-1 and - MPEG-2
image postprocessing for higher playback quality
automatic quality control: automatically reduces postprocessing level when CPU load is high
hue, saturation and luminance correction
experimental sharpening filter
noising (of course if you want it)
presets
completely free software: ffdshow is distributed under GPL
support for various subtitle formats
MP4 Converter
3.74 MB 
$ 14.95