K-Lite Codec Pack is a collection of VFW/ACM codecs, DirectShow filters and tools. Codecs and DirectShow filters are needed for encoding and decoding (playing) audio and video formats.The K-Lite Codec Pack is designed as a user-friendly solution for playing all your audio and movie files. With the K-Lite Codec Pack you should be able to play all the popular audio and video formats and even several less common formats.There are four versions of the K-Lite Codec Pack: Basic, Standard, Full and Mega.Basic contains contains everything you need to play all the common video file formats. Such as AVI, MKV, MP4, OGM, and FLV. This pack is for those who like a small no-nonsense pack.Standard version contains some additional features compared to the basic variant. It contains Media Player Classic, which is an excellent player for video files. It also has (better) support for playback of DVDs.