If you have any version of Windows except Windows 95 or Windows NT 4.0, the simplest solution would be to download DirectX 9. Version 8 and up of DirectX has a free motion jpeg decoder.
If you have Windows 95 you’ll have to get DirectX 8.0a, which is the latest version that can run on that OS
Other ways to play motion-jpeg avi’s is through the QuickTime Player (http://www.apple.com/quicktime/download/standalone) or through VirtualDub (http://www.virtualdub.org).
If for some reason you’re not satisfied with the above, or you have Windows NT 4 and want to play the file in Windows Media Player instead of QuickTime or VirtualDub, you can always get a pay motion-jpeg decoder from one of the companies that sell them. Here’s some:
- pegasus imaging http://www.pegasusimaging.com/picvideomjpeg.htm
- mainconcept http://www.mainconcept.com/codecs.shtml (middle of the page)
- morgan multimedia http://www.morgan-multimedia.com
- lead technologies http://www.leadtools.com/Utilities/Video-Codecs/codec_MCMP_MJPEG.htm
and possibly more...