Audio/Video Sync Issues w iPhone 12?

Question

Level 1

9 points

Audio/Video Sync Issues w iPhone 12?

Hi folks. I make simple Instagram song videos by recording video on my phone and simultaneously recording better audio in Logic. I've done 53 of them during Covid and have had zero issues. All done on with my X.

The way I have done it is, I drop the video into a project separating the audio, line up a "clap" waveform at the beginning or each audio track, and then export the movie with the better audio. Easy peasy. No problems.

On the 54th video and the first w my 12 Pro when I dropped the video into Logic, the audio from the phone itself is out of sync and drifts. I thought originally it was the recorded audio that was drifting but I believe it's right out of the gate. It's unusable for me now.

The X videos seem to all be at 29.97 and the 12 Pro is 30. But even when I change the project FPS to 30 it still drifts.

I feel like I'm losing my mind. I'm no video wizard but this was so easy until now.

Anyone see this or have any thoughts?

Here's an out of sync:

https://www.instagram.com/tv/CI1EDUMhlzr/?utm_source=ig_web_copy_link

And an in sync if that matters to anyone:

https://www.instagram.com/tv/CGwHfnqBIc4/?utm_source=ig_web_copy_link

Thanks!

Blu Sanders

Posted on Dec 23, 2020 4:52 PM

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Answer 1

blusanders Author

Level 1

9 points

Dec 29, 2020 8:27 AM in response to yoyoBen

Thanks for the reply. A little more clarity on this:

I've now figured out that it's the phone audio already out of sync when when I drop the video into Logic. It is out of sync with it's own locked audio. I have to copy that track to unlock and nudge it to sync it up but I'm now syncing with my lips rather than a waveform. So you're right that it's no starting at the same point but something is wrong here and it's driving me nuts. That audio and video should be synced by design right? It always used to be.

Also, I took some video w an iphone 8 to make sure I wasn't crazy and it works like it should.

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Answer 2

yoyoBen

Level 4

3,505 points

Dec 29, 2020 9:13 AM in response to blusanders

Thanks for posting your results.

And yes, video and audio should be in sync... this is one of the reasons you recorded a "clap", hopefully on audio and picture. Then you can use Logic to repair it by exporting audio to the movie without the need of rendering a new video.

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Answer 3

blusanders Author

Level 1

9 points

Dec 24, 2020 6:13 AM in response to yoyoBen

Appreciate the reply. As far as I know, they are lined up properly and rates match. It's worked with no hitches literally 50+ other times and only started when I got a new phone. I'm doing it the exact same way. Something is different, and certainly it could be user error, but I just can't tell what it is. I need to get another X from someone and try again that way to verify there isn't something else doing on. Thanks!

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Answer 4

blusanders Author

Level 1

9 points

Dec 29, 2020 9:35 AM in response to yoyoBen

I export as a new video w new audio bc the phone audio just isn't as good as the audio w a proper mic. That's the only reason. And it's been super easy w Logic.

I'm happy for this to be user error and something ridiculously simple. In fact I'm hoping to feel like a total idiot but with my problem solved :)

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