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Originally Posted by YC-156
I did say 5.5 million bytes per second, Ie. 44 Mbit/s. That is still not a problem for a modern PC....
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To put it into perspective, that's less than half the speed of a standard 100Mb Ethernet adaptor.
Since a modern PC can capture composite video with audio, compress it to MPEG or DIV-X, and write it to the hard drive in real time, I don't think performance would be an issue. We don't even need to save this to disk (which is the part that often causes video capture to choke).
Could the converted data be sent out on USB2, FireWire, Ethernet, SCSI or something and then converted to the required video signal by a fast D-A converter? This may be easier than trying to pursuade a graphics card to do something it really doesn't want to do?