The K Lite Codec Pack is a collection of codecs and related tools Codec is short for Compressor Decompressor Codecs are needed for encoding and decoding playing audio and video The K Lite Codec Pack is designed as a user friendly solution for playing all your movie files With the K Lite Codec Pack you should be able to play all the popular movie formats and even some rare formats K Lite Mega Codec Pack combines the contents of two packs K Lite Codec Pack Full and Real Alternative