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

Forum|Forum|3 years ago
January 24, 2023
41 replies
11780 views

after updating cc to the latest, my project with .mts video files (Panasonic AVCHD files), the audio is no longer in sync with the video. I have already tried clearing the cache files, .pek files, and .cfa files. completely out of sync. In addition, i tried rendering a short clip and that is out of sync. This is a major problem.

Sound

Correct answer Kevin-Monahan

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 It is obsolete.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

Show previous replies

Warren Heaton

Community Expert

It's been years since I've had to use AVCHD in PR and don't remember ever having trouble with it; however, there is definitely something wrong with how CC2019 processes the data. Using Final Cut Pro X to generate Apple ProRes422 (LT) allowed me to work with the footage as expected, but neither Premiere Pro nor Media Encode would play the original files nor transcoded files in sync. All I can say is "Yikes!".

Just re-read the post from Kevin about updating to High Sierra. I'll give that a try.

Jeff Schaap11773923

Known Participant

Over a year since this thread started and this is STILL an issue. I'm on the latest version of Premiere and Windows 10. I have project from 2014 where I directly imported .MTS files shot on a Sony FS-100. Had no issue during the editing. The powers that be want me to bring back this 30 minute mini-doc and make changes. Now, any interview clip that spans an automatic file break (17 minutes) is out of sync. I have tried everything mentioned here and nothing works. Going to try encoding the original files in Handbrake to H.264 and if that does not work then just going to realign all the clips by hand... HOURS of work. SO. FRUSTRATED. Come on Adobe.

I love how people on the forums tell you to post here and people here tell you to post on the forums. Hahahahaha.

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FeedbackCommunityMember

Inspiring

Mod note: Edited for content. Please do not link to tutorials showing how to install illegally downloaded software. This is against Adobe Community Guidelines (and common sense).

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FeedbackCommunityMember

Inspiring

You should not have an issue with this if you a) update to the latest WIN10 and High Sierra or better on Mac. b) ingest compact flash card disc based footage properly, that is, by copying the entire contents of your CF card to your hard drive, then importing the footage via the Media Browser.

Many editors have no idea you need to ingest CF based footage differently now. Simple importing had worked in the past, but there was also different support for Dolby decoding in previous packages. We no longer have that luxury. If you don't see this issue vanish by ingesting properly, post on forums, please.

Kevin-Monahan

Community Manager

Hello @FeedbackCommunityMember,

You wrote:

You should not have an issue with this if you a) update to the latest WIN10 and High Sierra or better on Mac. b) ingest compact flash card disc based footage properly, that is, by copying the entire contents of your CF card to your hard drive, then importing the footage via the Media Browser.

Correct. I believe you are quoting a comment I made on a YouTube Comment.

Many editors have no idea you need to ingest CF based footage differently now. Simple importing had worked in the past, but there was also different support for Dolby decoding in previous packages. We no longer have that luxury. If you don't see this issue vanish by ingesting properly, post on forums, please.

I'm sorry that some editors don't read the user guide on this topic. This has always been the method for importing card-based media. See Transfer assets from card-based media.

Thanks,
Kevin

Kevin Monahan - Sr. Community and Engagement Strategist – Adobe Pro Video and Audio

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Robert373667212dp6

Participating Frequently

Point of clarification . ? When u say CF cards, you also mean SD cards ? Thank u

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FeedbackCommunityMember

Inspiring

Mod note: Edited for content. Please do not link to tutorials showing how to install illegally downloaded software. This is against Adobe Community Guidelines (and common sense).

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illuminator_26

Participant

Having the same problem, tried many things: updated Adobe, cleared cache, was on the phone with Adobe custumer service for hours jumping hoops and the best sollution they had was converting the footage in Handbrake !!!???
In Quicktime the footage is sync, in all Adobe softwares it is not. I've been manually making the footage sync (by unsyncing it in premiere) this is unacceptable!!!
The first file is sync and from the second one on that has been recorded sequentially it goes a few frames off, Please fix!!!

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Steven Yasell

Participant

Same problem, I built a new PC with i9 CPU and clean install of Win10 and Premiere Pro CC so I could sync faster... I work with 8 cameras on live shoots, 7 are Sony, 1 is Canon DSLR. The Sony footage is all out of sync with the video after the first 16min clip break on every cam, and some cams first files say there's no audio at all, even though there is audio and it shows up on my 2nd work computer with Win7 and CS6... HUGE DISAPPOINTMENT and I have to buckle down with editing my backlog of projects in CS6 just to sync it all properly. I bought a full year of Premiere CC, only to run into this problem, the biggest problem for me in 15 years of editing with Adobe. Seriously looking for alternatives now if this isn't fixed... I can't so easily replace thousands of dollars worth of video cameras for other brands that Adobe will play well with. It wasn't a problem in the past, and now my upgrade to a new system is almost the exact opposite, a downgrade since I can't go frame by frame to match up audio that isn't lined up with the video anymore!!!!!

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FeedbackCommunityMember

Inspiring

it's not just MTS, I have the same issue with Canon as well, this is such ****, I am already a day late on 3 videos because I cannot find a work around for the audio being out of sync - lame adobe, real lame