I am taking really large and lengthy (6 hrs. and longer) AVI files and importing them as an asset. I am then trimming the the clip into a single 2 hr. length for DVD creation. It took over 8 hours to transcode the clip and kick out the first DVD. Ensuing copies took less than ten minutes. Is the long transcode time because the original clip is so long? I don't understand why this would be, since only 2 hours of it are in the timeline. If so, how can I do this in a more reasonable length of time?