Fought with it for days, finally gave up. I'd have to say that Samsung and Blue Iris don't work well together.
Switched this project to Luxriot and am running 9 cameras recording at 1920 X 1080 20 FPS and viewing all 9 at 1280 X 1024 10FPS on a 60" tv.
Processor usage 6 to 13% no drops, no...