answer:I agree that it should be theoretically possible. The firewire camera is “just another” input, in the sense that it is transmitting a video signal to the CPU. In that respect, the CPU should be accepting and processing it normally, the same way it would process USB or HDMI or any other input device. Hangouts is just an application that accepts video and audio signals from the processor and shoots them out through the app. hangouts doesn’t create the video or audio stream – it just uses it, regardless of the source. This makes me think that potentially the problem lies in GPU somehow, but that’s going to be dependent on your mother board and the various connections you have. Almost as if there’s a conflict where Hangouts and the firewire connection both want to exclusively control the same video stream. Bottom line, this should be theoretically possible, but something environmental is blocking it.