.mts audio out of sync with video. Please fix. resume support for dolby files.

Hello @AlanaTreppler,

Thanks for your message. The issue has to do with the AC3 audio format used in AVCHD recordings. It is obsolete.

Please see user @RjL190365's response here.

Since version 2017.1.4, Adobe no longer included an AC3 decoder or encoder due to Dolby Laboratories' increasingly restrictive licensing rules.

 

So, on MacOS newer versions of Premiere Pro now no longer support AC3 audio at all without the installation of a third-party audio plugin.

 

The Dolby suite for MacOS has not been updated much since 2017, and is not guaranteed to work properly on an Apple-silicon Mac.

 

In other words, AVCHD is now considered obsolete by the video recording industry. Newer consumer camcorders record in regular H.264 (not AVCHD) format, with audio now encoded as AAC instead of AC3.

Dolby indicates that AC3 is supported on macOS; however: https://developer.dolby.com/platforms/apple/macos/os-support/

I'm afraid Windows users might also be having trouble with AC3 audio. From what I recall, the OS is supposed to support AC3 audio.

I advise copying the entire contents of your Private folder to your HD and importing via Media Browser to see if that works for you. This has worked for other users. All card-based media should be imported to Premiere Pro in this fashion.

If that won't work, try exploring other format options for the camcorder or purchasing a newer device.

Thanks,
Kevin