Codec Decoder Pack

Codec Decoder Pack provides a complete set of DirectShow filters, splitters and plug-ins for viewing and listening to virtually any audio and video formats, from the most popular formats such as AVI, DIVX, FLV, MKV, MP3, MP4, MOV, MPEG, WMV and XVID to the most obscure in Windows Media Player or any other DirectShow supported Media Player. What this means is that with Codec Decoder not only you will be able to play any audio and video files regardless of their encoding and in whichever Media Player you're using but also with the best Audio and Picture quality possible (even be able to play broken media files).

Codec Decoder Pack is completely free, it's published under the GNU Open Source license and is compatible with Windows 98, NT, SE, 2000, XP, Vista, 7 (both 32 and 64 bit) and supports any DirectShow supported Media Player such as Windows Media Player, VLC Player, Media Player Classic, GOM Player and KMPlayer.