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steven586
Participating Frequently
February 7, 2020
Answered

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

  • February 7, 2020
  • 5 replies
  • 15031 views

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

Correct answer Richard M Knight

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.

5 replies

chongy79413174
chongy79413174
Participant
November 16, 2024

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.

R
Community Expert
Richard M KnightCommunity Expert
Community Expert
July 9, 2020

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.

erinf17501375
erinf17501375
Participant
July 9, 2020

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)

Y
Yossi.Siegel
Known Participant
February 2, 2022

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. 

R
Community Expert
Richard M KnightCommunity ExpertCorrect answer
Community Expert
February 7, 2020

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.

    S
    steven586Author
    Participating Frequently
    February 16, 2020

    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

    Shivangi_Gupta
    Community Manager
    Shivangi_GuptaCommunity Manager
    Community Manager
    February 7, 2020

    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-premiere-pro/td-p/10348229?page=1

     

    Let us know if it helps.

    Thanks,

    Shivangi

    S
    steven586Author
    Participating Frequently
    February 7, 2020

    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

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