Hopefully this isn't covered somewhere else. I am trying to summarise my understanding of the current state of play with Mac laptops, Jitter and realtime video so i can get advice and options.
I am using a MacBook Air with only a single Thunderbolt port and two USB ports and want to get input from a camera (ideally not a webcam) and then send to a projector. I need to be able to move around a room with the camera ideally up to 5-10 meters from the computer.
As far as I understand things there are a few Thunderbolt devices about (perhaps the best offering is the Blackmagic Intensity in terms of economy and latency) however all of these are 'end of chain' devices and none allow you to play out to a projector through the device at the same time as capture.
With only one Thunderbolt/minidisplay port this leaves me with no way to get the images to a projector.
Based on what I read on the forum it seems I need two Thunderbolt ports (read as upgrade to a rMBP). I then have the option to capture the video using the Blackmagic and either go out HDMI or use a mini displayPort to DVI adaptor to get to the projector.
So is a new retina MacBook Pro what I am going to have to get or can this be done some other way? It would be nice to be able to solve this using USB but I am unsure about USB devices and also wonder if there is a physical limit with the length of the cable...
Of course another limitation in all this is also the lack of processing power of the MacBook Air but I'd like to see what options may exist independent of that issue.