K-Lite Codec Pack is a collection of filters, codecs, and tools which work in combination with popular media players to play all video and audio files on your PC. The K-Lite Codec Pack contains Media Player Classic which supports playback of all known file types. Alternative DirectShow based players also work, including Windows Media Player/Media Center, ZoomPlayer, KM Player, PotPlayer, GOM Player, and many others.
BASIC: 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: Contains Media Player Classic. This pack is recommended for the average user.
FULL: Contains GraphStudioNext, and extra DirectShow filters.
MEGA: Complete pack. Contains VFW/ACM codecs for video encoding/editing.