I've never tried this before but measure out 20 minute segments and that will be around the capacity of a 4.7GB DVD disc. Your pushing nearly an hour of video at 12GB, so split it into three 20 minute, or whatever time it is exactly, sections and put each section on a separate DVD. Just make sure the Timeline window is highlighted and then do an Export->To DVD and it will convert it to mpeg for DVD burning. And trimming is editing.

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