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ffdShow

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ffdShow

Publisher's Description
ffdshow is DirectShow and VFW codec for decoding/encoding many video and audio formats, including DivX and XviD movies using libavcodec, xvid and other opensourced libraries with a rich set of postprocessing filters.

 
OS: N/A
License: Open Source
Install ffdShow:
This was the last stable release - though it dates back to June 2002

Install ffdShow-Alpha:
This Alpha release dates from Oct 2004 and fixes several issues with Windows XP.
An Alpha release impled the software is unfinished and may contain bugs. But since this is already over 2 years old it is probably pretty safe.