I have a MBPr15 with 2 thunderbolt ports. I have two cameras and two blackmagic mini recorders. Can I run each camera > blackmagic > thunderbolt into OBS and control switching using software? The reason I ask is because, I'm so close. I see 1 camera with OBS Video capture, but the second camera signal is corrupt ( flashing between half torn green and non moving image of the moment I plugged the second camera in ). When I use blackmagic source, I cannot get a single source. I have the latest driver. OBS recognizes the blackmagic devices. Each device works on a separate Windows test machine running the same version of OBS, but it only has a single thunderbolt input. Just looking for some pointers in the proper direction.