Making a Movie in iMovie HD and iDVD 5: Visual QuickProject Guide

Before a project is burned to disc, iDVD encodes the data into a format that DVD players will recognize. This process also compresses your movie's gigabytes of video footage into a size that will fit on the disc. iDVD offers two types of encoding options, which you access from iDVD's preferences.

For projects of up to 2 hours in length, choose Best Quality. At burn time, iDVD analyzes the movie to determine the best level of compression while retaining image and sound quality.

This means Best Quality offers no background encoding, but you gain an extra 60 minutes' worth of footage on disc.

Best Performance

Best Quality