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.
Changes in 5.0.0:
Updated ffdshow to revision 3029
Updated Gabest MPEG splitter to version 1.2.1164.0
Updated Codec tweak Tool to version 3.0.0
Updated MediaInfo Lite to version 0.7.18
Support for Unicode filenames has been added to the MediaInfo tool
Minor changes
K-Lite Codec Pack 5.0.0 Full