Originally Posted by
cseeman
Any UVC compliant webcam will "work." Will it work well given that there are no Mac specific drivers? You generally will NOT be able to take advantage of some of the 920 specific features. It's not worth the extra money if you're using it on the Mac.
I don't know if the third party driver will control more than one webcam.
Wirecast itself will at least take advantage of a webcam's in built resolution. It does a better job of that than other programs I know of. Wirecast polls the webcam and presents its inbuilt resolutions. If you change to another model webcam you'll get a different resolution set. It will only show the results of one webcam so having matching webcams help.
For example, Two C910s will show all the resolutions available and allow you to set each one individually.
If you were to use a C910 and 9000 though both cameras may only offer the C910 resolutions which would be a mess for the 9000.
Matching webcams are best. Two C910s or Two Lifecam Cinema Studios would be good if you have the USB2 buses.
Keep in mind you MUST have the USB2 bandwidth. For HD webcams you really need TWO USB buses (that's BUSES NOT PORTS). In many laptops there may be two or more ports going to a single bus. My 2011 15" MBP has two buses. The Facetime webcam is on one of the buses though but you can deliberately knock down its bandwidth by dropping the frame size. Frame size, impacts bandwidth on the bus.
Also when Wirecast developed webcam detection they also examined the inbuilt compression in the webcam. It pics the codec (MJPEG I believe) which gives you the better frame rate (I believe the other is a higher bandwidth YUV variant). The result is that you can get 1080 30fps from any webcam capable of that.
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