That's just it, I don't want to import anything. I want to press play on one and press record on the other, just as you would with a dvd player and dvd recorder connected.
The catch is that the machine needs to have horsepower to both decode the one disc, and encode the other one at the same time.
Unlike your stand-alone DVD recorder, a PC does not have the customer chips built-in that are optimized to encode DVD-quality video in real time, so it is comparitively much work.
I guess technically it may well be possible (although it would probably still be advisable to encode to HD first before burning to DVD to prevent buffer underrun issues)... But your requirements are very, very specific here... I doubt there is much of a market for such a solution.
I dunno, perhaps. I can do it with a £30 DVD player and a £65 DVD recorder, so you would think my £800 PC could cope with it, but perhaps not. I just figured some clever programmer would have come up with a way of doing it like the standalone players do it, intercepting the image as it's being played rather than decoding, reencoding and burning data from and to the disks. But maybe it's not even possible.
The catch is that the machine needs to have horsepower to both decode the one disc, and encode the other one at the same time.
Unlike your stand-alone DVD recorder, a PC does not have the customer chips built-in that are optimized to encode DVD-quality video in real time, so it is comparitively much work.
I guess technically it may well be possible (although it would probably still be advisable to encode to HD first before burning to DVD to prevent buffer underrun issues)... But your requirements are very, very specific here... I doubt there is much of a market for such a solution.