The K-Lite Codec Pack has a couple of major advantages compared to other codec packs:
- It it always up-to-date with the latest versions of the codecs.
- It is very user-friendly and the installation is fully customizable, meaning that you can install only those components that you really want.
- It has been very well tested, so that the package doesn't contain any conflicting codecs.
- It is a very complete package, containing everything you need to play your movies.

There are three versions of the K-Lite Codec Pack: Basic, Standard and Full.
• K-Lite Codec Pack Basic contains only the most essential things. It contains everything you need to be able to play the most popular and widespread formats. It is small enough to fit on a single floppy. Also great for including on your movie CDs.
• K-Lite Codec Pack Standard contains everything you need to play all the commonly used formats. This package should be enough for the average user.
• K-Lite Codec Pack Full contains even more codecs. It also has encoding support for the various formats. This package is for power users and people who do their own encodings.

Features of K-Lite Codec Pack 4.2.5 FULL version :

• Player :
- Media Player Classic [version 6.4.9.1 rev. 82]
- Media Player Classic Home Cinema [version 1.1.843]
• FFDShow :
- ffdshow [revision 2202]
- ffdshow VFW interface
- extra plugins
• DirectShow video filters :
- XviD [version 1.2.0 build 2008-01-10]
- DivX [version 6.8.4]
- On2 VP6 [version 6.4.2.0]
- On2 VP7 [version 7.0.10.0]
- MPEG-2 (Cyberlink) [version 8.1.0.1608]
- MPEG-2 (Gabest) [version 1.0.0.4]
- MPEG-1 (MainConcept) [version 1.0.0.78]
• DirectShow audio decoding filters:
- AC3/DTS/LPCM/MP1/MP2 (AC3Filter) [version 1.51a]
- Vorbis (CoreVorbis) [version 1.1.0.79]
- AAC (MONOGRAM) [version 0.9.5.0]
• DirectShow audio parsers:
- MusePack (MONOGRAM) [version 0.9.1.2 | 0.3.1.2]
- WavPack (CoreWavPack) [version 1.1.1]
- FLAC (madFLAC) [version 1.8]
- Monkey's Audio (DCoder) [version 1.0]
- OptimFROG (RadLight) [version 1.0.0.1]
- DC-Bass Source [version 1.1.1]
- AC3/DTS Source (AC3File) [version 0.5b]
- AMR (MONOGRAM) [version 1.0.1.0]
• DirectShow source filters:
- AVI splitter (Gabest) [version 1.0.0.9]
- AVI splitter (Haali Media Splitter) [version 1.8.122.18]
- MP4 splitter (Haali Media Splitter) [version 1.8.122.18]
- MP4 splitter (Gabest) [version 1.0.0.4]
- Matroska splitter (Haali Media Splitter) [version 1.8.122.18]
- Matroska splitter (Gabest) [version 1.0.3.0]
- Ogg splitter (Haali Media Splitter) [version 1.8.122.18]
- Ogg splitter (Gabest) [version 1.0.0.1]
- MPEG PS/TS splitter (Gabest) [version 1.0.0.4]
- MPEG PS/TS splitter (Haali Media Splitter) [version 1.8.122.18]
- FLV splitter (Gabest) [version 1.0.0.4]
- CDXA Reader (Gabest) [version 1.0.0.2]
• DirectShow subtitle filter:
- DirectVobSub (a.k.a. VSFilter) [version 2.39]
- DirectVobSub (a.k.a. VSFilter) [version 2.33]
• Other filters:
- Haali Video Renderer [version 1.8.122.18]
• VFW video codecs:
- XviD [version 1.2.0 build 2008-01-10]
- DivX [version 6.8.4]
- x264 [revision 913]
- On2 VP6 [version 6.4.2.0]
- On2 VP7 [version 7.0.10.0]
- Intel Indeo 4 [version 4.51.16.2]
- Intel Indeo 5 [version 5.2562.15.54]
- Intel I.263 [version 2.55.1.16]
- huffyuv [version 2.1.1 CCE Patch 0.2.5]
- YV12 (Helix) [version 1.2]
• ACM audio codecs:
- MP3 (Fraunhofer) [version 3.4.0.0]
- MP3 (LAME) [version 3.98.2]
- AC3ACM [version 1.4]
- Vorbis [version 0.0.3.6]
- DivX ;) Audio [version 4.2.0.0]
• Tools:
- Codec Tweak Tool [version 2.2.9]
- GSpot Codec Information Appliance [version 2.70a]
- MediaInfo Lite [version 0.7.7.7]
- VobSubStrip [version 0.11]
- GraphEdit [build 061102]
- Haali Muxer
- FourCC Changer
- Bitrate Calculator

Changes from K-Lite Codec Pack 4.1.7 FULL to K-Lite Codec Pack 4.2.5 FULL :

- Added Media Player Classic Home Cinema version 1.1.843. This version of MPC has some new functionality. Such as internal DXVA decoders for H.264 and VC-1 video, and support for the video renderer EVR. At this moment the regular version of MPC is still included and used by default. Once the Home Cinema version becomes more stable, it will become the default.
- Please read the FAQ if you want to use the DXVA functionality of MPC-HC. All requirements to make it work are explained in there.
- Updated Media Player Classic to version 6.4.9.1 rev. 82
- Updated ffdshow to revision 2202
- Removed libtheora and tremor plugins for ffdshow. Libavcodec is used instead.
- Updated LAME MP3 ACM codec to version 3.98.2
- Updated MediaInfo Lite to version 0.7.7.7
- When creating file associations for WMP/BS.Player/ZoomPlayer, the icon of the player is used as filetype icon. The MPC style icons are now only used when associating files to MPC.
- Minor changes

Features of K-Lite Codec Pack 4.2.5 STANDARD version :

• Player :
- Media Player Classic [version 6.4.9.1 rev. 82]
- Media Player Classic Home Cinema [version 1.1.843]
• FFDShow :
- FFDShow [rev. 2202]
• DirectShow video decoding filters :
- MPEG-2 (Cyberlink) [version 8.1.0.1608]
• DirectShow source filters :
- AVI splitter (Gabest) [version 1.0.0.9]
- AVI splitter (Haali Media Splitter) [version 1.8.122.18]
- MP4 splitter (Haali Media Splitter) [version 1.8.122.18]
- MP4 splitter (Gabest) [version 1.0.0.4]
- Matroska splitter (Haali Media Splitter) [version 1.8.122.18]
- Ogg splitter (Haali Media Splitter) [version 1.8.122.18]
- FLV splitter (Gabest) [version 1.0.0.4]
- MPEG PS/TS splitter (Gabest) [version 1.0.0.4]
- MPEG PS/TS splitter (Haali Media Splitter) [version 1.8.122.18]
• DirectShow subtitle filter :
- DirectVobSub (a.k.a. VSFilter) [version 2.39]
• Other filters :
- Haali Video Renderer [version 1.8.122.18]
• Tools :
- Codec Tweak Tool [version 2.2.9]
- MediaInfo Lite [version 0.7.7.7]
- VobSubStrip [version 0.11]

Changes from K-Lite Codec Pack 4.1.7 STANDARD to K-Lite Codec Pack 4.2.5 :

- Added Media Player Classic Home Cinema version 1.1.843. This version of MPC has some new functionality. Such as internal DXVA decoders for H.264 and VC-1 video, and support for the video renderer EVR. At this moment the regular version of MPC is still included and used by default. Once the Home Cinema version becomes more stable, it will become the default.
- Please read the FAQ if you want to use the DXVA functionality of MPC-HC. All requirements to make it work are explained in there.
- Updated Media Player Classic to version 6.4.9.1 rev. 82
- Updated ffdshow to revision 2202
- Removed libtheora and tremor plugins for ffdshow. Libavcodec is used instead.
- Updated MediaInfo Lite to version 0.7.7.7
- Removed GSpot Codec Information Appliance
- Removed DirectVobSub 2.33 (version 2.39 is still included)
- When creating file associations for WMP/BS.Player/ZoomPlayer, the icon of the player is used as filetype icon. The MPC style icons are now only used when associating files to MPC.
- Minor changes

Features of K-Lite Codec Pack 4.2.5 BASIC version :

- ffdshow [revision 2202]
• DirectShow source filters:
- AVI splitter (Haali Media Splitter) [version 1.8.122.18]
- MP4 splitter (Haali Media Splitter) [version 1.8.122.18]
- MP4 splitter (Gabest) [version 1.0.0.4]
- Matroska splitter (Haali Media Splitter) [version 1.8.122.18]
- Ogg splitter (Haali Media Splitter) [version 1.8.122.18]
- MPEG PS/TS splitter (Haali Media Splitter) [version 1.8.122.18]
- FLV splitter (Gabest) [version 1.0.0.4]
• DirectShow subtitle filter:
- DirectVobSub (a.k.a. VSFilter) [version 2.39]
• Tools:
- Codec Tweak Tool [version 2.2.9]

Changes from K-Lite Codec Pack 3.8.0 BASIC to K-Lite Codec Pack 4.2.5 :

- Added ffdshow [revision 2202]
- Added Haali Media Splitter [version 1.8.122.18]
- Added MP4 splitter (Gabest)
- Added FLV splitter (Gabest)
- Updated DirectVobSub to version 2.39
- Removed Xvid decoder
- Removed Fraunhofer MP3 decoder
- Removed AC3Filter
- Removed GSpot Codec Information Applicance
- Removed VobSubStrip
- Minor changes

Important Note :

- The K-Lite Codec Pack works only on Windows 2000/XP/2003/Vista.