Question / Help How do I display two outputs on one stream?

[sadniasoidad]

I am in the market to purchase a capture card, but I need to make sure I get the correct one for the job. I am planning on running two separate outputs (gameplay from both my computer and my girlfriends computer) and streaming from the same computer I would be gaming on. Im not 100% sure how capture cards work, Would my girlfriend still be able to play games while I am receiving the gameplay from her output?Any help is appreciated!

Here is a crude drawing of what I mean
(http://i.imgur.com/EaYH8xY.png)

 

[bifuteki]

Best thing is have both webcams hooked up to your Desktop. Have a capturecard in your computer to capture your girlfriend. If you can get something internal get the Avermedia Game Broadcaster HD. Works really well for this kind of thing.