When I tape interviews using two cameras, I'd love to be able to let my 2nd videographer know when I'm moving or to let me know when he's moving/zooming/panning so there's at least one stationary camera at all times. Does anyone have a successful method they use? I don't think headsets would be useful, as we're typically fairly close. And trying to signal with gestures when two people are concentrating never works well, and I hate to break the flow of the interviewee.
Is there any possibility of using something like an odd frequency sound-clicker that I could later remove without affecting the normal conversation frequencies? Sort of like a high (or low) pitched "beep"?