When preparing content for DVD Studio Pro using the QuickTime MPEG Encoder, you can set the Field Dominance for the clip that is being encoded. The "Automatic" setting attempts to determine the correct field order of the selected clip. You can override this using the "Lower" or "Upper" settings, to specify a particular field order when encoding the clip.

Figure 1 Setting field dominance
The QuickTime MPEG Encoder automatically detects the field dominance of a DV clip. Specifying a particular field order for a DV clip has no effect.
For more information on Field Dominance, refer to the following articles: