A less known codec, Sunplus 32-bit Compressor (or SP54 codec) allows you to play AVI files created with the most popular digital cameras.
The AVI files generated by this camera can only be played if you use the SP54 codec.
Normally, the codec is provided with the camera software, but if for some reason you don’t have this codec, you can download it from here, too.
The container used by these devices is similar to a form of MJPEG without a part of the information and the FOURCCs used by this codec seem to be SP44
This codec is especially helpful if you use the Mustek's GSmart pocket digital camera or other hardware such as Aiptek's Pocketcam digital still camera, Logitech's ClickSmart and Mustek's gSmart mini 2.