K-Lite 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. 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 audio and video formats and even some rare formats.
The K-Lite Codec Pack always very up-to-date with the newest (and/or best) versions of the components. The installation is fully customizable, meaning that you are able install exactly those components that you really want. Uninstallation removes all files and registry entries created by the pack. It is extremely easy to make a fully customized unattended installation. It tries to avoid potential problems with existing codecs and even fixes some problems. The pack is able to detect broken codecs and filters on your system, and remove them for you. It is a very complete package, containing everything you need to play your movies. Suitable for both novice and expert users.

Changes in K-Lite Mega Codec Pack 2.00 (2007-04-20):
- Updated ffdshow to revison 1109
- Added CoreAVC [version 1.3.0.0]
- The QuickTime ActiveX control for Internet Explorer is now listed as a separate component in the installer
- The RealMedia ActiveX control for Internet Explorer is now listed as a separate component in the installer
- Removed LAME CLI/DLL
- Removed LameDropXPd
- Removed OggDropXPd
- All three above are now available as separate installers
- Removed MP3 Source
- Removed ShoutCast Source
- Removed FLAC filters
- Removed Monkey's Audio filters
- Added DC-Bass Source [version 1.00]. This filter replaces the above four removed audio filters. It additionally adds support for the following audio formats: True Audio (.tta), Alac (.alac) and Tracker (.mod .it .xm .umx. s3m .mtm .mo3)
- Removed MMCompView
- Updated MusePack decoder to version 1.0.0.4
- Added RadLight OptimFROG audio decoder [version 1.0.0.1]
- Added CDDA Reader [version 1.0.0.1]
- Added CDXA Reader [version 1.0.0.1]