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Gradual loss of audio video sync in edited video downloaded from Youtube

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Lev Polyakov
Gradual loss of audio video sync in edited video downloaded from Youtube
on Jun 25, 2018 at 10:18:36 pm

Hey Everyone.

My friend Jules and I are doing a bi-weekly series on youtube that we initially shoot on Google Hangouts, save the video, and edit it together with an animated intro in Premiere. We have noticed that the longer the video plays, the more out of sync the sound becomes. This is not the case in the initial downloaded youtube video.







Here are the screenshots of the exporting and timeline below:

https://imgur.com/a/oyxmkk2

Any help would be highly appreciated and we'll give you a shoutout in our next video!

-Lev



PS: Could it be the difference in frame-rate in the animated intro VS the youtube video.


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Jon Doughtie
Re: Gradual loss of audio video sync in edited video downloaded from Youtube
on Jun 26, 2018 at 2:18:17 pm

Well, for sure PPro does not like variable frame rate video. So if the video you are editing with has a variable frame rate, it needs to be converted to a fixed frame rate with a tool such as Handbrake.

I've also seen this happen due to a change is sampling rate on the audio in post, but that is less common.

System:
Dell Precision T7600 (x2)
Win 7 64-bit
32GB RAM
Adobe CC 2017.1 (as of 8/2017)
256GB SSD system drive
4 internal media drives RAID 5
Typically cutting short form from UHD MP4, HD MP4, and HD P2 MXF.


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Lev Polyakov
Re: Gradual loss of audio video sync in edited video downloaded from Youtube
on Jun 30, 2018 at 4:06:21 pm

Hey Jon.

Thank you so much. I will try out Handbrake to see if this helps. In the last video which was shorter, we did not experience this lag to such a noticeable extent, so the longer a video is, the more this issue seems to be exasperated.


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