Das XP Codec Pack enthält eine Reihe wichtiger Audio- und Video-Codec: AC3Filter, AVI Splitter, CDXA Reader, CoreAAC (AAC DirectShow Decoder), CoreFlac Decoder, FFDShow, GPL MPEG-1/2 Decoder, Matroska Splitter, Media Player Classic, OggSplitter/CoreVorbis, RealMedia Splitter, RadLight MPC Filter, RadLight APE Filter, RadLight OFR Filter, RadLight TTA Filter, The Codec Detective, VSFilter (DirectVobSub).