Changing a video asset’s field dominance
Each video frame comprises two sets of scan lines, called fields. One field contains all the odd-numbered scan lines (the top field or field A); the other contains all the even-numbered scan lines (the bottom field or field B). Standard TVs display interlaced video, where one field is displayed followed by the other. Computer monitors and high-definition TVs display non-interlaced (progressive) video, where both fields are displayed at the same time.
A video asset’s field dominance (also known as field order) determines which field is displayed first. If the field dominance setting is incorrect, the video appears fine when viewed on a computer monitor, but displays badly on a standard TV.
Different video formats use different field dominance settings, and some video editors can create files with unusual or incorrect settings. The only way to detect an incorrect field dominance setting is to burn a disc and watch the video carefully on a TV. If you see motion artifacts that are not apparent when you play the same disc on a PC, you can change the problem asset’s field dominance setting in DVDit Pro and burn the disc again.
To change a video asset’s field dominance:
- Locate the asset on the Palette window’s Media tab.
- Right-click on the asset and choose Properties from the shortcut menu. The Properties dialog box appears.
- Select the Field Dominance property.
- Choose a different setting from the Value list. For example, if the asset’s current setting is Top Field, try changing it to Bottom Field.
- Click the OK button.
After changing the field dominance, burn a new disc and play it on a TV to see if the problem has been corrected.