i am looking for a motion detector program that will use a live web stream instead of a web cam

preferebly one thet will encode into divx avi

i am looking for a program thet will detect motion on a live web stream and download preferably encode into divx avi

So that the motion detector is triggered by something happening in a web page?

so it is trigered by something that hapends on the live stream

on your computer or on a web page? i think that is what DJNafey was asking (sorry if i'm wrong
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i want a program so that i can have a diferent computeer stream a web cam out and a diferent computer will motion detect