Windows media player is normally not capable of playing some special audio and video files . And some these files are most common ,like MP4 ,3GP,DivX,FLV etc .So we need to install Codec packs for to make Windows media player to play all these unsupported video and audio files.

These are decoders which renders unsupported files for Windows media player .
This Codec pack for Windows media player supports the following media files .

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, and UMX .

Download Codec pack for Windows Media Player to play unsupported video and audio files .