4.5

112Compressor User Guide
2. To modify the caption’s start point or end point, do any of the following:
• Adjust the start point or end point 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 point or end point 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.
• Change the start point or end point to a precise value: Select the hours, minutes,
seconds, or frames area of timecode in the Caption Start or Caption End field, enter
a new two-digit number, then press return.
Changing the start point also modifies the end point (the caption moves to an earlier or
later position in time, but its duration remains the same).
Changing the end point also modifies the duration of the caption (the start point
remains the same, but the end point changes, which shortens or lengthens the
caption’s duration).
3. To modify the duration of a caption, do any of the following:
• Modify the caption duration in single-frame increments: Click the down arrow or up
arrow on either side of the Caption Duration field.
• Modify the caption duration 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.
• Modify the caption duration by a precise value: Select the hours, minutes, seconds,
or frames area of timecode in the Caption Duration field, enter a new two-digit
number, then press return.
Changing a caption’s duration also modifies its end point.
WARNING: Modifying start points and end points 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.