gokey

Hi i own a small family newsagent - i have five cctv cameras set up around the shop all of which are wireless. They each have thier own Wireless AV reciever each of which plug into a single device which combines all the signals into a five-way-splitscreen image (for viewing on TVs etc). Is it possible to connect the standard A/V output the image splitter provides to a PC for DVR recording WITHOUT purchasing any new equipment (A/V to USB devices etc). I was just wondering before i buy one. thnx Josh