All cards with hardware encoding capabilities should work, but I'm not sure if there are any w/USB.
EDIT: Seems like there is a hybrid, though --> http://www.hauppauge.de/de/site/products/data_hvr1900.html
Probably expensive ...
			
			EDIT: Seems like there is a hybrid, though --> http://www.hauppauge.de/de/site/products/data_hvr1900.html
Probably expensive ...
 
							
				 
 
		 Norway
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