4.5

109Compressor User Guide
• Paint-On: The caption appears letter by letter from left to right, beginning at at
the caption’s timecode start point. If multiple captions overlap in time, they’re
stacked vertically onscreen, with each new caption "painting on” beneath the
previous caption.
• Roll-Up: The caption appears letter by letter from left to right (like Paint-On).
Additionally, if multiple captions overlap in time, newly appearing captions push
older captions up line by line. When you choose Roll-up, an additional pop-up menu
appears, letting you choose how many caption lines can appear onscreen at a time:
2, 3, or 4 lines.
Note: Modifying the caption animation style may introduce position or timing errors.
Captions with timing errors are highlighted in red in the Captions list. For more information
about caption timing, see Adjust caption timing in Compressor.
Edit caption content and placement
1. In Compressor, in the Captions list or Subtitles list (at the bottom of the Closed
Captions inspector or Subtitles inspector), click the caption you want to modify.
The playhead in the preview area jumps to the timecode start position of the caption
you selected, and the caption text appears in the Caption Text field in the inspector,
ready to edit.
Note: The caption should also appear superimposed over the video in the preview area.
If the caption isn’t visible in the preview area, click the Captions button
,
and make
sure On is checkmarked in the list. If the caption still isn’t visible in the preview area, try
dragging the playhead a few frames to the right (if the caption style is animated—Paint-
On, for example—the caption may require several frames to appear onscreen).
2. Click in the Caption Text field, then edit the text.
Onscreen, each CEA-608 closed caption appears on a single line, and each line is
limited to 32 characters.
Each iTT subtitle can span dozens of characters—from the left margin of the frame to
the right margin—but each subtitle is limited to two lines.
Note: There are no text placement controls for SRT subtitles. SRT subtitles are always
centered horizontally, and additional lines of text beyond the first are stacked vertically.