Package Overview:
The Windows 7 Codec Pack supports almost every compression and file type used by modern video and audio files.
The package is easy to install, while also offering advanced settings to the high end user:
For simple installation select "Easy Installation".
For advanced installation options select "Expert Installation".

Codec's Explained:
A codec is a piece of software on either a device or computer capable of encoding and/or decoding video and/or audio data from files, streams and broadcasts. The word Codec is a portmanteau of 'compressor-decompressor'

Compression types include:
x264 | h.264 | AVC | DivX | XviD | MP4 | MPEG4 | MPEG2 | AC3 | DTS and many more.

File types include:
.mkv | .avi | .flv | .mp4 | .m4v | .m4a | .ogm | .flac | .ape | .aac | .ogg | .mpc and many more.