Live Video Feed As Background

I'm still a newbie at Processing but here it goes. I have found a 'ripple effect' that works by distorting the background image.

Source Code - http://www.openprocessing.org/visuals/?visualID=7715

I want to set the background image to a live feed via webcam, so its would appear that the user is looking into water and his image reflected.

So basically all I need to know is how to set the background to a live webcam feed?

Any help would be much appreciated.

Cheers,

Chris