K-Lite Mega Codec Pack 把许多影音编码工具、多媒体播放程序打包成一个文件，包含最新流行的 Xvid/Divx 影片编码、DVD 的 AC3 音乐编码工具，此类工具的好处是：可以节省您寻找编码工具、播放工具的时间，只要下载单一文件，安装后，便可以播放各式各样的多媒体文件。 当你的Windows XP 升级成 SP1 后，Windows XP将不内建Indeo Codec了，微软将Indeo Codec抽离了，因为Ligos不再免费提供下载， 改成要付费的 Indeo Video & Audio Codec；如此将造成许多带有AVI动画的游戏无法在Windows XP上正常操作，这个软件中竟然带有Ligos Indeo XP 5.2820.15.58 版，解决你无法在Windows XP正常完一些游戏软件的同时也一并解决所有影音编码的问题，那你可不能缺少K-Lite Codec Pack。

K-Lite Mega Codec Pack软件内包含有以下软件：
- K-Lite Codec Pack 2.27 Full
- QuickTime Alternative 1.32
- Real Alternative 1.22
- BSplayer [version 1.01.811]
- Media Player Classic [version 6.4.8.2]
- GDivX Zenith [version 1.0]
- DivX Pro [version 5.2.1] [Decoding]
- DivX Pro [version 5.1.1] [Encoding] - DivX ;) MPEG-4 Low and Fast motion [version 4.1.0.3927]
- XviD [Version 1.0.2 build 2004-08-29] [Decoding]
- XviD [Version 1.0.2 build 2004-08-29] [Encoding]
- 3ivX [version D4 4.5.1] [Decoding]
- 3ivX [version D4 4.5.1] [Encoding]
- Windows Media 7 [version 7.1.0.3055]
- Windows Media 8 [version 8.0.0.371]
- Windows Media 9 [version 10.0.0.3646]
- Windows Media 9 VCM [version 9.0.1.369]
- On2 VP3 [version 3.2.5.0]
- On2 VP6 [version 6.2.0.10] [Decoding]
- On2 VP6 [version 6.2.0.10] [Encoding]
- Cyberlink DVD decoder [version 5.0.0.1130]
- Ligos Indeo XP [version 5.2820.15.58]
- Intel Indeo [version 4.51.16.2]
- Intel Indeo [version 3.24.15.03]
- Intel I.263 [version 2.55.1.16]
- huffyuv [version 2.2.0]
- MS MPEG-4 [version 4.1.0.3927]
- Ligos/Elecard/MainConcept MPEG-2 demuxers & decoders
- QuickTime codecs [version 6.5.1.17]
- QuickTime DirectShow filter
- QuickTime Control Panel
- QuickTime plugin for Internet Explorer [version 6.5.0.48]
- QuickTime plugin for Opera/Mozilla/Netscape [version 6.4.0.29]
- Extra QuickTime plugins
- RealMedia codecs [version 6.0.12.1040]
- RealMedia DirectShow splitter [version 1.0.0.9]
- RealMedia plugin for Internet Explorer [version 6.0.12.857]
- RealMedia plugin for Opera/Mozilla/Netscape [version 6.0.12.857]
- Fraunhofer MP3 DirectShow decoder [version 1.9.0.311]
- WMA DirectShow decoder [version 8.0.0.4487]
- AC3 DirectShow decoder [version 0.70b mod]
- AC3 ACM decoder [version 0.7]
- Ogg Vorbis DirectShow decoder (CoreVorbis) [version 1.0]
- AAC DirectShow decoder (CoreAAC) [version 1.0b9]
- MusePack DirectShow decoder [version 1.0.0.3]
- Voxware DirectShow decoder [version 1.0.0.12]
- Monkey's Audio DirectShow decoder [version 1.00]
- LAME MP3 Encoder [version 3.96.1]
- Ogg Vorbis DirectShow splitter [version 0.9.9.5] and Vorbis DLLs [version 1.1 RC1]
 - Matroska DirectShow splitter [version 1.0.2.4]
- Matroska DirectShow muxer [version 1.0.0.9]
- DirectVobSub (vsfilter) [version 2.33]
- Matrix Mixer [version 0.30b]
- SHOUTcast Source [version 1.0.0.1]
- Morgan Multimedia Stream Switcher [version 0.9.9]
- DivX Anti-Freeze [version 0.4]
- GSpot Codec Information Appliance [version 2.51 beta 2 build 040828]
- FourCC Changer
- Bitrate Calculator

更新记录：
Changes in K-Lite Mega Codec Pack 4.6.2:
- Updated Media Player Classic Homecinema to version 1.2.991.0
- The internal DXVA decoders of MPC-HC are now enabled by default on Windows Vista/Seven
- The internal subtitle renderer of MPC-HC is now enabled by default on Windows Vista/Seven
- Updated ffdshow to revision 2676
- Updated Cyberlink MPEG-2 decoder to version 8.2.0.1211
- Removed On2 VP6 decoding filter. It could in rare occasions cause some compatibility isues. ffdshow is used instead for decoding VP6 video. That was already the default setting in previous version of the pack
- Removed MainConcept MPEG-1 decoder
- Updated MusePack splitter/decoder
- Updated Monkey's Audio decoder
- Changed default AC3 decoder from AC3Filter to ffdshow
- Updated Gabest MPEG splitter to version 1.2.988.0
- Updated x264VFW to revision 1093
- Updated MediaInfo Lite to version 0.7.10
- Fixed problem where the DC-Bass Source filter could break playback of .mod video files that are created by certain digital video cameras.
- Minor changes