Directshow Filters for Ogg Vorbis, Speex, Theora, FLAC, and WebM

The aim of this project is to provide the most complete implementation of the Xiph.org codecs 
for Windows and DirectShow. This includes decoders and encoders for all the Xiph.org formats as 
well as Annodex.

It is released under a BSD license, so they can be used by both open-source and commercial 
applications.