Replacing DirectShow with managed OpenCV. Video playback / capture / CV

Hi
I am desperately trying to get a http://www.grassvalley.com/products/pegasus to stream into vvvv, it comes with a SDK but no mention of DirectShow.
The task is a bit daunting for my skills but I am stubborn enough… I am not sure if the new OpenCV libraries are a way to go or not… help, ideas, hints?
tx
Simone