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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
11807 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 J. Monahan Jr.

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 It is obsolete.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

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FeedbackCommunityMember

Inspiring

Same issue here. I am ready to pull my hair out.

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FeedbackCommunityMember

Inspiring

I am having this same issue with files from A Panasonic AG-HMC150 AVCCAM Camcorder. This was not an issue with PP 2017 but started in PP 2018 and continues in PP 2019. I would like to take advantage of new features but I am stuck with PP 2017 until this issue is resolved.

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FeedbackCommunityMember

Inspiring

I have the same problem but Kevin Monahan Adobe Staff wrote in a his post dated May 23, 2018 10:21 AM
"FWIW, I tested a couple of files and noted that the standalone .MTS file was out of sync on playback. The file that was brought into the project by first copying the entire PRIVATE folder to the media drive, and then importing via Media Browser was not out of sync."
So is this the answer or have I missed something?
Furthermore, I do not want to empty my media caches as suggested by some because it slows reloads down.

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FeedbackCommunityMember

Inspiring

Surely we don't need to do a work around every time we need to import mts footage!
It was all OK in Prem Pro 2017. Cant Adobe simply fix the problem in Prem Pro 2018!?

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FeedbackCommunityMember

Inspiring

For anyone having problems with import audio sync issues with adobe premiere cc 2018, I have found solution that works great. I was having problems keeping my .ts and .m2ts with ac3 5.1 audio captures in sync when importing into adobe premiere. Luckily premiere cc now actually supports the .mkv format and it works flawlessly. Simply put your files into an .mkv container and re import into premiere, the result is a perfectly synced import. Unlike handbrake, this method requires no conversion or loss of quality and is quick to do. To do this, download the free program mkvmerge and drag you files into the program and mux it into a .mkv container. Import the .mkv file into premiere and all is good. Keep in mind this only works with the latest versions of adobe premiere cc 2018. Hope this helps someone until adobe fixes the problem.

mlombar

Participant

It seems like the best option is to use Media Encoder to transcode the MTS files into MOV files. I'm not happy about it since it makes the file size so much bigger but it seems to work and is pretty easy and quick to do. I did a lot of searching online yesterday and this was the method that most people used. BUT Adobe get your act together MANY of us use camera's that shoot in AVCHD we need this expensive software to work with one of the most common files types. It would be like Photoshop not working well with JPGs. FIX THIS and ***** the mobile versions of your software!

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FeedbackCommunityMember

Inspiring

I continue to have the same problem and need a workaround or and answer. AVCHD files will not play back in sync. PPPro 2018 CC.

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FeedbackCommunityMember

Inspiring

We have the same issue with .mts files (Pansonic AVCHD). We have tried the suggested fixes here and in the Adobe forum, without resolve. What is the status on the fix by Adobe?

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FeedbackCommunityMember

Inspiring

Same issue. I just upgraded and I notice that the missing dolby audio decoder is need to hear the audio.

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FeedbackCommunityMember

Inspiring

I have the same issue. Camera: Sony NX5r. Usually the first 30 minutes (the first file) is fine. Starting with the second and on, when imported into Premiere cc 2018, the audio will go out of sync. These files while out of sync when editing, is insync when viewing in a media viewer. Same file will be perfectly synchronized if imported in to Premiere 2017.

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