Manual

Chapter 29 Linking and Editing Video and Audio in Sync 399
VI
An out-of-sync indicator appears whenever the following conditions occur:
 Audio and video clip items from the same media file are out of sync. Because they
come from the same media file, these items always show out-of-sync indicators, even
if they are not currently linked.
 Audio and video clip items belonging to a merged clip have been moved out of sync.
Because they come from different media files, these items only show out-of-sync
indicators if they are linked.
 Audio and video clip items have been linked together in the Timeline, and then
moved out of sync.
Audio and video clip items that have a sync relationship must be vertically overlapping
in the Timeline for out-of-sync indicators to appear when the items are moved out of
sync. No indicator appears if linked audio and video clip items are so far apart that they
no longer overlap.
If you move these items back together so that they overlap, the indicators appear again.
Audio moved away
from video clip
Audio moved back
under video clip