Black Magic’s Decklink comes with a live key tool that seemed like it would work great for bug placement…..I think that the workflow was fairly similar to what was suggested earlier in this thread about taking a page from the old school…if you take a signal into the card, and use the tool to overlay a graphic ontop of the signal live and take the output live to a tape making the decklink like a switcher with a key….
I’m not too sure about this, but when I glanced at this tool when I first installed my decklink that’s the first application I thought of for that program….FCP is great, but if you have to deal with layering multiple graphics over an entire show, do it the old school way.