Adjusting AV sync in VV3?

valnar wrote on 7/11/2002, 4:21 PM
I captured a video from VHS and the audio is slightly behind the video when viewing the AVI, or in Vegas. What tool can I use in Vegas to adjust either the length of the audio, the offset (when it starts compared to the video), or other such mechanism to try to get it in sync, or close to it. Yes, the original AVI is faulty, but I'd like to correct it in Vegas instead of recapturing if possible.

Thank you.
Robert

Comments

Chienworks wrote on 7/11/2002, 4:38 PM
Click on the audio part of the clip and type U to ungroup it from the video. You may now slide it back and forth on the timeline to line up the start of the audio with the start of the video. If the speed needs adjustment, move the cursor to the end of the audio clip until it turns into a little box with an arrow. Hold the Ctrl key down and move the end of the clip left to squish it and speed it up or right to stretch it and slow it down.
valnar wrote on 7/11/2002, 5:57 PM
Cool, thanks! How do I add both to a new group then?
Chienworks wrote on 7/11/2002, 6:21 PM
Oops. Sorry, forgot to mention that very important part ;)

Click on the video section, then Ctrl-click on the audio section. Both should be selected (highlighted) now. Press G to group them back together.
valnar wrote on 7/11/2002, 6:34 PM
Doh! Thanks! I should have figured that out.
Chienworks wrote on 7/11/2002, 8:06 PM
One other detail you might want to check into ... by default, stretching/squishing the audio track invokes a processing algorithm that preserves the pitch while changing the length. This is very nice as long as you don't have to change the length much. But if you have to make larger changes it can start sounding rather metalic or robotic. If you right-mouse-button click on the audio track and choose properties, you can have it change length and pitch (like slowing down or speeding up a tape recorder), which may sound better sometimes.