4.5

113Compressor User Guide
Modify the timing of multiple captions at the same time
1. In the Captions list or Subtitles list in Compressor (at the bottom of the Closed Captions
inspector or Subtitles inspector), select multiple captions.
Tip: Shift-click or Command-click to select multiple captions.
If the selected captions have different timecode values, the Caption Start, Caption End,
and Caption Duration fields in the inspector display dashes.
2. To modify the caption start points or end points of the selected captions proportionally,
do any of the following:
• Adjust the start points or end points in single-frame increments: Click the down
arrow or up arrow on either side of the Caption Start or Caption End field.
• Change the start points or end points in larger increments: Position the pointer over
the hours, minutes, seconds, or frames area of timecode in the Caption Start or
Caption End field, then drag left or right.
The affected timecodes of all selected captions are modified by equal amounts.
3. To modify the caption durations proportionally, do any of the following:
• Modify the caption durations in single-frame increments: Click the down arrow or up
arrow on either side of the Caption Duration field.
• Modify the caption durations in larger increments: Position the pointer over the
hours, minutes, seconds, or frames area of timecode in the Caption Duration field,
then drag left or right.
The affected timecodes of all selected captions are modified by equal amounts.
WARNING: Modifying caption durations may introduce timing errors (such as captions that
overlap in time or captions that extend beyond the duration of video). Captions with errors
are highlighted in red in the Captions list or Subtitles list at the bottom of the inspector.
Captions that extend beyond the duration of video in a job are dimmed in the list. If you
don’t fix timing errors, your transcoding job will fail.
Adjust the global timing of captions (CEA-608 closed captions only)
Occasionally, an imported set of closed captions may be out of sync with the source video
by a few seconds throughout the program. The CEA-608 format lets you offset all captions
forward or backward in time to manually restore sync.
• In the Closed Captions inspector in Compressor, do any of the following in the
Offset field:
• Adjust the offset in single-frame increments: Click the down arrow or up arrow.
• Modify the offset in larger increments: Drag left or right over the hours, minutes,
seconds, or frames area of timecode.
• Modify the offset by a precise value: Select the hours, minutes, seconds, or frames
area of timecode, enter a new two-digit number, then press return.
Tip: To check the new sync, play back the video in the preview area.