Audio and video out of sync -- best way to fix?

DDCCD wrote on 2/12/2010, 11:43 AM
Used my laptop (onboard video cam) record a seminar. Now I see that audio is off by a bit.... what is best way to fix this? If I fix it in one place, I assume that will correct it for rest of video.... or is there something I do not understand (is audio more compressed than video?!)

Still trying to get both audio and video to lock so that edits / trimmer / crossfades occur in tandem.

:)

Comments

MSmart wrote on 2/12/2010, 10:56 PM
Before you slice and dice, ungroup the video and audio, highlight the event and type the letter u (or right click, Group > Remove From). Drag the audio forward or back to sync, once that's done, group the audio and video back together.

This will only work if the OOS is consistent for the entire length of the video. It would be more tricky if the OOS varies from beginning to end.
Chienworks wrote on 2/13/2010, 5:33 AM
Once you have the beginning in sync skip to the end. If the sync is still wrong there you can hold the Ctrl key down and drag the end of the audio left to speed it up or right to slow it down until the end matches up too.

Addressing your lock problem ... after making these changes click on the video portion, then Ctrl-click on the audio portion. Both are now selected and nothing else should be. Press g to group them. As a simple test, click on either the audio or video only and try moving it. The other should move with it. If not you have the ignore event grouping button active.

When they are successfully grouped then operations like move, trim, crossfade, and delete should affect both of them. Adding in manual fades and envelopes will only affect one and not the other no matter what the grouping status is.