It 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

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