FFDShow MPEG-4 Video Decoder
FFDSHOW is a DirectShow decoding filter for decompressing DivX, XviD, WMV, MPEG-1 and MPEG-2 movies.
AC3 Filter
AC3Filter is high quality freeware DirectShow audio decoder and processor filter used to decode audio tracks in movies (DVD, MPEG4 and others). It has a priority on wide functionality and convenient settings.
Koepi's XviD Codec
XviD is the best currently available MPEG-4 video codec solution and additionally XviD is free software!
Ligos Indeo Codec
Video codecs originally developed by Intel, but later taken over by Ligos. Latests versions provide good picture quality and many different bit rates.
DivX
The DivX codec is the latest and greatest release of DivX, the best compression technology for high-resolution movies.
Sharp G.726 Audio Codec
The Sharp G.726 Audio Codec needed to play MPEG4 files. Solves Audio Codec Tag 45.
Stinky's MPEG-2 Codec
This MPEG-2 Codec will allow you to open MPEG-2 files in TMPGEnc and in MS Media Player, plus a host of other programs.
VoxWare MetaSound Audio CoDec
Voxware provides high-quality sound using low- to mid-range bit rates and solves Audio Codec Tag 75.
x264 Video Codec
x264 is an open source H.264 (also known as MPEG-4 AVC) based video codec available for many platforms.
Fraunhofer MPEG Layer-3 Audio Decoder
This codec enables playback of files encoded in the ever so popular MP3 music file format.