Adobe After Effects / Premiere Pro sound out of sync

[thunderous71]

This is from my blog (http://www.thunderous71.com/?p=1116) but I thought some of you here may be having the same probelm.

If you are discovering that when importing some of your video into Adobe Premiere or After Effects you find that the sound is out of synchronization with the video here is the reason why and some tips on fixing the issue.

Firstly always check your project settings match your video and sound formats!
That done the error you are most likely having is this.

Firstly Adobe Premiere and After Effects does not support Variable Frame Rate on videos.

What? Well when your camera, phone or screen capture software captures video it will save it at the frame rate you have specified. For example 29.7fps (common for most video). But not all capture devices are the same and not all can capture 100% of the time at the specified rate.

For example, you may have a DSL set to record at 1080p at 29.7fps. Now that’s all well and good but when capturing sometimes a frame may get dropped for a variety of reasons thus you end up with a missing frame. Most players and video editors with just take the frame before and after the drop and blend to make the missing frame. This is VFR and is VERY common on consumer / Pro-consumer cameras. The same problem happens when capturing from live streams etc.

Now when importing a video that has VFR Adobe Premiere and After Effects does not appear to blend or fill in the missing frame thus the sound ends up longer than the clip thus it becomes out of sync.

There is NO fix at the current time for this but as always there are work arounds.

How to fix?

Well there is no 100% way to fix this.



1) First thing quit Premiere / After Effects and try cleaning the cache of the editor by hand! (WARNING: Will cause ALL projects to re transcoded when their project is opened again)

C:\Users\thunderous71\AppData\Roaming\Adobe\Common\Media Cache

C:\Users\thunderous71\AppData\Roaming\Adobe\Common\Media Cache Files

Change username as required.

Also where the project file is saved, erase the contents of this Folder (back it up just in case).

Adobe Premiere Pro Preview Files

Now when you open the project file again it will be re transcoded and “may” be interpreted better… that’s a big MAY though.



2) Short clips, manually alter the sound by un-linking the sound from the video on the time line and adjust (right click).



3) Long Clips, re-encode with Handbrake making sure to set the quality to high and the video to a constant frame rate (this is BAD as may result in poor final production values but it works).

4) If using QT/MOV use QTPro to save as a reference file.



Want this fixed?

Fill in the form at : https://www.adobe.com/cfusion/mmform/in ... e=wishform

 

[DSN]

I had the same issue with my replay xd 720.

I just unlink the video and audio. Set the audio speed ( mine was 98.6% ) and then relinked them and trimmed the dead audio off the end.

Another little tip for project settings : Just drag the video itself from the file controlled onto the new comp button, and it will make the comp the same rez / framerate as the video you dropped on.

 

[Daily Derps]

Hey guys I have this problem occasionally. I found, by accident, a simple-ish way to work around this. I opened both my video and audio (I record them separately and sync later) in Sony Vegas. And synced my files there and exported them into a Premiere Pro format. This created a set of copies and a project file that can be opened in Premiere Pro. I didn't have the correct version of Premiere Pro to open the project file, but the duplicate video and audio files that it created, when opened, perfectly in sync and unaltered.
Hope this helps somewhat. It is a bit silly completely unneccessary, but until Adobe get their act together this is the best I can do.