K-Lite Mega Codec Pack is a collection of codecs, DirectShow filters and tools.
Codecs and DirectShow filters are needed for encoding and decoding (playing) audio and video formats.

he K-Lite Mega Codec Pack is designed as an user-friendly solution for playing all your movie files.
With K-Lite Codec Pack you should be able to play all the popular audio and video formats and even some rare formats.
Mega Codec Pack includes everything needed to play online and offline computer media.
This pack is from the makers of the K-lite codec pack.