Windows video tools
|Microsoft Multimedia Tools|
Not only does Windows Media Tools install the mpeg4 codec for avi and asf video playback, but it also has a lot of video editing software for these formats as well. Encode asf and mpeg4 avi movies, plus many more great features.
Installation Notes: If you install Windows Media Tools and your system still will not playback mpeg4 avi and asf video files, delete mpg4c32.dll and mpg4ds32.ax,(if it exists), in your C:\windows\system\ directory and then reinstall Windows Media Tools.
Notice: This software is no longer supported by Microsoft. The reason I have posted this software here is because the newer version of Windows Media Tools disables the playback and encoding of mpeg4v3 avi files, and with all the mpeg4 avi files floating around the net, we need something to view them. If you would like to download the newer version of Windows Media Tools, visit the Windows Media Homepage.