My guess is it doesn't work well with footage with cuts in it, it's probably meant for continuous shots (there are a few long ones in Hugo and Gravity for examp

My guess is it doesn't work well with footage with cuts in it, it's probably meant for continuous shots (there are a few long ones in Hugo and Gravity for example, so this might be interesting input material). From how the climbers appear, porn would probably decompose into static images.