ki Decoder Pack includes almost all of the most well-known extensions, but if there is a codec that you don't need you can always disable it.
You no longer have to worry about not being able to watch movies or listen to music on your computer. This package includes codecs for the Media Player Classic, FFDShow, RealMedia Splitter, QuickTime Splitter, VP6dec, VP7dec, AC3Filter, RLMPCdec, RLAPEdec, XCDA Reader and Haali Splitter players.