BNC output to laptop

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http://forum.allaboutcircuits.com – Hi All! I have a device with a BNC output and I would like to have my laptop capturing and recording the video from that device. I have no clear what to do. Can I just use a BNC-to-USB adaptor and plug it in my laptop http://www.ebay.com/bhp/bnc-to-usb or I need a card like this http://hauppauge.com/site/products/data_impactvcb.html ? Any help is appreciated! Thanks (Embedded)