Is the RS 422 control on the Decklink HD Extreme a true Sony VTR protocol? I'm running a couple of Mac Pros for video playback in a live show, and I'm wondering if I can fire them through the Decklink card with a Ross Vision 2 switcher with the VTR option. Ross says they have not tested Black Magic products.
For what it might be worth, I have successfully conformed a movie to HDCAM in Premiere from an EDL using a Blackmagic Decklink and a Sony JH3 Deck. Deck control playback was frame-accurate in that case.