I just bought a Canon HF G20 camcorder, and did a test video of my old Panasonic vs. the new Canon in all 5 or 6 recording modes at 30fps. When I dowloaded the video into i-movie, the Canon video looked much better than the Panasonic, particularly in low light. But when I burned it in i-DVD, which is the main purpose I have video equipment for, all of the Canon footage looked terrible, with waivy lines, blurring, artifacts, which did NOT appear in the Panasonic-filmed scenes. Any idea why this is happening?