Apple DVD Studio Pro 4 - Manual (Page 616)

About the Field 1 and Field 2 Settings
The closed caption standard provides for encoding up to four caption streams in Line
21. The two most commonly used streams (C1 and C2) use field 1, and the other two
streams (C3 and C4) use field 2.
A closed caption file assigned to a track in DVD Studio Pro can have captions only in
field 1 (C1 and C2) or in both fields (support for all four streams). It is important for you
to configure the track’s Line 21 settings to match the file’s configuration.
Note: Because the C3 and C4 streams are rarely used, you may assume the closed caption
file contains only the C1 and C2 streams, and only supports field 1. Be sure to verify this
with a test disc and a DVD player connected to a television monitor before sending your
disc to a replicator.
To assign a closed caption file to a track
1 Select the track so that it appears in the Track Editor and its properties appear in the
Inspector.
2 Click the Other tab in the Track Inspector.
3 To choose the closed caption file, do one of the following:
• In the Closed Caption (Line 21) area, click Choose. In the navigation dialog, locate and
select the closed caption file to assign to this track. Click Choose.
• Control-click in the Track Editor’s video stream, then choose Import Line 21 File from
the shortcut menu. Locate the closed caption file in the navigation dialog and click
Import.
4 Select the Field 1 and Field 2 boxes to match the configuration of the caption file.
Note: Most often you should select Field 1 and leave Field 2 unselected.
You can only assign one file to a track.
616 Chapter 23 Using Advanced Features