You FIRST need a way to get the Signal, INTO the laptop, you need to get a USB to TV/Video Dongle, Now using this and the software that came with it, as well as other software, You Hook up the OUTPUT from the DVD Player, to the Video Input on the USB Dongle, Either, Component (Best) or Composite, (OK) Video, and AV Audio, and set to "Record" on the PC, and "Play" the DVD and then the PC will "Record" the incoming signal from, the DVD player, to the HDD in the PC. Once digitised, and saved it can be manipulated, any way you want.
Now if you want to do the REVERSE IE: Take a signal FROM the PC, to the DVD, then you simply setup the DVD as a Second monitor, use a TV to set it all up, once it is all working on the Laptop and TV, simply swing the Output, away from the TV's Input, to the DVD's Input,and select record, the PC, will then output whatever, to the screen, and whatever is displayed on-screen, will be recorded by the DVD's hard drive.
You First though must setup the PC to have multiple monitors, it is best to get the most up to date drivers and install them in the PC. FIRST. Go to this MS link below it shows you how to set u,setup as CLONE mode, I think will be best, also don't set initial resolution too high to start, set it to say 800x600 32 bit, to start, and work up, until your TV complains and stop. As related once setup, swing the PC's output to the DVD, and record.
http://support.microsoft.com/kb/307873
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