Get yourself a firewire card, a firewire cable (I think it comes with the camera) and capture your tapes to dv-avi (windows) or mov (mac).
Btw dv-avi/mov mini dv tapes capture in 720×576 pal or 720×480 for ntsc.
The Canon xl2 is a SD-camera and so is the footage: HD (1080i) is out of the question.
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