Audio and Video - Speed not matching - How to Sync?

[steven586]

Hi!

I have an old mpg-video file where video and audio is out of sync.

After trying to fix this with moving the video relative to the audio I noticed that it doesn't work.

If the sync is perfect in the beginning, it's out of sync at the end.

And the other way around.

So the speed of audio and video simply are not perfectly the same, which adds up to a few seconds after one hour.

Is there a simple way to fix this?

I would link to align two ore more points and then premiere should match the speed of audio and video.

Thanks,

 Steven

[Shivangi_Gupta]

Hi Steven

Synchronization can be affected if the audio and video are not camera captured or if the clip is with variable frame rate. Could you share more details?

• What is the source(camera) of the media files?
• Which version of Adobe Premiere Pro are you using?

Additionaly, please take a look at this article: https://community.adobe.com/t5/premiere-pro/faq-how-to-work-with-variable-frame-rate-vfr-media-in-pr...

Let us know if it helps.

Thanks,

Shivangi

[steven586]

Hi Shivangi!

The file is from capturing an old VHS tape using an USB-Video-Grabber.

The file format in .mpg - it's MPEG2 valid for buring a DVD.

I want to use Premiere to convert it to .MP4 however.

The properties-dialog doen't show "variable frame rate".

Thanks!

 Steven

[Richard M Knight · Accepted solution]

Find a sync point on the audio and the video both at the start and end of the clips. Trim both tracks to these sync points and align the start points. Select the rate stretch tool, shortcut 'R', select only the audio track and drag the out point to match the out point of the video. Go back to the normal cursor, shortcut 'V' you can then drag the the clip out to full length.

This will only work if the audio and video are drifting by a constant amount.

[steven586]

Hi Richard,

This completely solved my problem - thank you very much!

I took some time to get it perfectly right.

The problem itself is quite annoing and I still don't know the cause.

But at least there is a way to fix it.

Thanks again,

  Steven

[Baffy19]

An excellent solution to the problem. Bravo 👏

[erinf17501375]

Hi

Is there anyone who can explain this reply in more detail? I am a total beginner at Premiere Pro and I don't understand this answer so any help would be gratefully received (ie, I don't know how to find the end sync point, because if I adjust the audio track so it syncs at the beginning, it doesn't sync at the end, so how can I trim the tracks so that the start AND end points sync? etc)

[Yossi.Siegel]

It's like solving a mix and match puzzle.

First you have to start them at some point around the beginning of the clip where the audio an video will match. After that you find a later part of the clip where there should be SOUND B. Next you find SOUND B on the audio track. Then you drag that part of the audio clip out using rate stretch, to the matching part in the video where that sound should be heard. 

[Richard M Knight]

The step you might be missing is selecting the 'rate stretch' tool shortcut 'R' this will leave the start point where it is and will make the audio track longer or shorter to match the video length.

[chongy79413174]

I tried everything, didn't work. I match the front, and stretch the end to match. Didn't work, the audio is messed up in the middle. I wonder why.