From MediaCodec.org : A collection of Video and Audio Codecs and tools that are required to Encode / Decode (i.e., PLAY) Audio and Video files. With Windows Essentials Codec Pack you should be able to play 99% of all the movies and music files that you download off the internet, and stay up to date with the latest Codecs through W.E.C.P's Audio / Video Codec Update Service.
user-friendly (i.e., click-click all done!) it keeps your computer up to date with the latest codecs (don't get left behind) and it's 1000% spamware / adware / spyware / scumware free (yey!)
But more importantly, unlike other codec packs which include several filters / decoders that are capable of decoding the same media format (which usually cause many conflicts / errors) W.E.C.P was especially designed to assign each file type to the most appropriate filter / decoder, which not only reduces the installer size but also eliminates many of the conflicts / errors caused by multiple codecs being used to decode the same file type(s).Which formats does W.E.C.P supports ?
W.E.C.P. is designed as a near complete solution for all your video and audio needs, with it you can play Audio CDs, DVDs, (S)VCDs and XCDs on the fly, and it adds support for 3GP, AAC, AC3, APE, AVI, DivX, 3ivx, DAT, h.264, x264, AVC, Nero Digital, DTS, FLV, FLAC, HD-MOV, MPEG-1, MPEG-2, M4A, MPC, MP3, MP4, MO3, MOD, MKV/MKA, MTM, OFR, TTA, OGG/OGM, S3M, Vorbis, VOB, WavPack, ATRAC3, XviD, XM, WV, UMX and many more formats so you could play any video / audio file with your favorite media player or with the free and wonderful Media Player Classic player that comes included with W.E.C.P.
Added Thursday 16 August, 2007.