Video and audio out of sync

bernkopf

In my almost finished project audio tracks are suddenly a few seconds out of their corresponding video tracks in all clips.

How can I fix it?

How can I prevent it next time?

borate

Hard to say what caused it, but it's likely due to an editing decision.

If the clips in question were A/V linked originally, right-click on them and Restore Linked Clips .

If they were not A/V clips, try selecting all audio clips in question and drag them into sync.

If on different tracks select those out of sync and right-click on one. Then Group Selected Clips, and drag.

bernkopf

Thank you so much for your effort, but ...

I am afraid we are using different versions of Videopad, or even different editors at all.

The clips in question were A/V linked originally.

Right clicks on Audio/Video parts of clips produce menus like this:

https://drive.google.com/file/d/1_APJni613beNTrsMLszZHi4yD4q6rQqD/view?usp=sharing

In the menus there is no "Restore Linked Clips" option.

In the linked file you can also see the version of my Videopad.

borate

Note the "unlink from video or audio" in each list, which confirms that a clip is a currently linked.

First thing, install this release. If no change, see the instructions below.

How A/V clips could be out of sync is a mystery that is best solved by sharing your project for analysis. It's not difficult, takes little time and can be done privately.

Just follow these steps, one-by-one. Don't skip any. And, if using Google Drive for the upload, remember to change "restricted" to "anyone with link can view."

Back up --- With your project on the timeline, click on MENU at the top-left. Click FILE|BACK UP PROJECT FILES TO FOLDER. Choose a folder and SELECT FOLDER.
Upload --- Use a free server - Google Drive, MS OneDrive, etc. - to upload the saved, numbered FOLDER. No need to upload the individual VPJ or export file.
Get link --- Right-click the file and click SHARE. If using Google, right-click the file, click SHARE | SHARE. Change "restricted" to "anyone ... can view"
Share --- Click COPY LINK or OK | DONE. Paste that link here, or click the folder at the top-right of this forum to message it privately. It won't be shared.

bernkopf

I installed the newest release, no change.

Here is the link to the backup folder:

https://drive.google.com/drive/folders/1cGKuXI18gMlpGxyUaaeRXtYuT-Cx4efC?usp=sharing

Please have a look at it.

borate

Seems fine here, but dead sync is tough to confirm as there is scant lip sync. Little there is looks okay.

All clips are A/V linked, and really can't go out of sync. The issue may lie with your PC's resources in handling multiple 6-channel MTS files.

Here's a workaround that may help...

Download this file, which is a single clip of the entire audio track, and add it to the project. It will be in the Audio File bin (top-left tabs).

Place the red cursor at the very head of the project. Right-click the new audio file in the bin and Place on Sequence as Overlay at Cursor...

Delete audio track 1... This will UNlink all clips.

Expand the timeline with the slider at the bottom-right to more clearly see each clip... Use the bottom scrollbar as well.

You have said that the entire track is out of sync. If it's still out, nudge it into sync by dragging audio track 2 left or right, as necessary. Very small movements will make a big difference. The more the timeline is expanded the finer the increments will be as the track is dragged. It should not take much.

If you make a mistake, click <ctrl-Z> to backtrack, step-by-step.

Save Project File AS routinely, giving it a unique # or name, so as not to overwrite prior saves. Using Save Project Files (no AS) will overwrite. From the HOME tab, the AS choice is available by clicking the caret to the right of the Save Project button on the toolbar. That way you're protected, and shouldn't lose anything.

bernkopf

Thanks for your reply.

But I am afraid that the workaround you recommend wouldn't work, as the time differences between audio and video in individual clips are different.

I did it this way:

Right click on audio track of a clip
Unlink from video
Drag - drop the audio track on its right position
Right click on the audio track
Restore linked video

It was a little bit tiring but foolproof.

borate

Interesting. RElinking restores original sync, right back to it was when the file was loaded, despite manually dragging an unlinked track.

Whatever works.😃

Your project seemed in sync here, so this may point to PC resources - especially with those 6-channel MTS files.