Slight Lag In Video

I am running a show now using 4 DL2's fixtures (3 as projectors, 1 as a camera). I have a rack set up as advised in the DL2 manual with the Marshall Splitters, D-TEk Pro, etc. (Rack sits with me at FOH and all signals are fed over CAT5). There is a noticable slight delay in the live video shots that I am taking - the video is a few frames behind the live audio. I understand the whole speed of sound/speed of light thing, but I was wondering if there was a piece of equipment that I can purchase to correct or lessen this delay.

Thanks for any advice!

-Chris