User Manual

Maintaining Sync While Trimming
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Maintaining Sync While Trimming
Because single-roller trims (A-side or B-side) can change the duration of the track being
trimmed, any relationships that exist with other tracks downstream of the trim lose sync. Trim
editing uses two features that prevent unintentional sync breaks between two or more video and
audio tracks when performing trims:
• You can use an overwrite trim to add black filler on either the A-side or the B-side of a
transition while maintaining the overall duration of the track and the sync relationships.
For more information, see “Overwrite Trimming” on page 741.
• You can sync lock tracks that maintain a synchronized relationship.
If you perform an overwrite trim moving across the edit point and away from the selected
side of the transition, your Avid editing application performs a dual roller trim on
sync-locked tracks.
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Because dual-roller trims do not cause sync breaks, you can add black only while performing
single-roller trims, and sync-locked tracks only aid single-roller trim functions.
To trim with sync-locked tracks:
1. Do one of the following:
t Click the Sync Lock button in the Track Selector panel for the track you want to keep in
sync.
The Sync Lock icon appears.
t Click the Sync Lock All button to switch sync lock on and off for all tracks.
Sync Lock icon (top) and Sync Lock All button (bottom) in the Track Selector panel
2. Perform single-roller trims as necessary, with the following results:
- When you trim the A-side of a transition forward, all other segments locked in sync
move forward with the trim. If the transitions are staggered, this action might split one
or more of the segments at the sync point established by the position indicator, leaving
filler.