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I am using a MAC Studio M2 machine for video editing. Once I updated my OS to Sonoma 14.6.1 and Adobe Premiere to 24.6.1, I began having issues with importing video files. When I import a .MTS (AVCHD) video in Premiere Pro, there is an audio drift of approximately 20 seconds.
I did not have any issues when the OS was Ventura 13.6 or an older version of Sonoma and Abobe Premiere was 24.2.1.
I am not sure what the issue is at this point.
For now, use either the beta version 25.2 or downgrade to 23.6.8 to fix sync issues.
Installing AC-3 manually (<https://www.majorgeeks.com/files/details/dolby_ac_3ac_4_installer.html>) brings audio back in Premiere Pro (v25.0.0, Build 61 and v25.1.0, Build 73) but reproducible out of lip-sync.
By @Andreas23802052vbg1
@RoyZ_Phoenix wrote: "I am still strugling to complete my project. . I have tried to provide all the information that was requested by Rach, Sumeet, and Ann. Can someone please help?"
In short, there is a bug in Pr 24/25 that causes A/V clips with Dolby Digital playback out of sync.
The easiest fix for some time has been to install Pr 23.6.8 and edit in that version. The easiest way today if you need to complete the project asap is to install the beta version of Pr 25.2. They say that it
...Hi @noahahaa,
Did @Gioia5E80 solution work for you? If not, have you tried transcoding these files to ProRes LT or similar?
I hope the team or community can help you soon. Sorry for the problem.
Thanks,
Kevin
The issue was reported to the team. I hope they can find a fix soon. Sorry for the hassle.
Thanks,
Kevin
Hello @noahahaa,
The team has reproduced this issue and is working on a fix. At this time, you can transcode the footage or roll back to the previous version. Let us know if you need help with that.
Sorry for the frustration.
Thanks,
Kevin
Hi,
Please provide the developers with more information. See, How do I write a bug report?
There is a bug with AVCHD footage in 24.x. Try to roll back a version or transcode your media to ProRes. I hope the advice helps.
Thanks,
Kevin
Hi @wxthings ,
Welcome to the Premiere Pro forums! We are glad to see you here. We need a few more details to try to help with the issue. Please see, How do I write a bug report?
Thanks for submitting your bug report. I hope we can help you soon. Sorry for the frustration!
Thanks,
Rach
Hi @RoyZ_Phoenix,
Welcome to the Premiere Pro forums! We’re happy you’ve reached out.
We’ll need a bit more information to try to help with your issue. Can you provide more information on the clip format? Also, I just want to confirm that the project, timeline, and clip are all in the same framerate.
Did this issue just begin in 25.1 or was it also present in 25.0?
Please see: How do I write a bug report?
I hope we can help you soon.
Hi @RoyZ_Phoenix,
Does your issue seem similar to this one since you have MTS and ac3 files?
https://community.adobe.com/t5/premiere-pro-bugs/p-mts-video-and-audio-not-synched-on-mac-os-and-adobe-24/idi-p/14876135