P: .MTS video and audio not synched on Mac OS and Adobe 24

[Patricia227709208kyp]

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.  

[filmspezialist]

I am currently on PP 24.6.3. When I am importing a m2ts file I found that picture and sound are out of sync. This never happened before (and I am working with PP for over 10 years now!).

When I play the clip  outside of PP all is fine - picture and sound are perfectly in sync. Once I import the file into PP picture and sound are out of sync (at least 18 frames)..

Any help on this?

Moderator Edit: Bug title changed 

[blackrosekiller]

@Kevin-MonahanI am having the same issue too where sound is out of sync from my Sony AVCHD video camera only after importing after just updating to Premiere Pro 2025. I used Creative Cloud Desktop to reinstall 2024 so now both versions are on my PC. PPro 2024 is working fine. It said when installing 2024 that it would not update that version. Since 2025 is still on my PC too will Creative Cloud Desktop detect that version and prompt for new updates when it become availalbe? Then once it works again I can uninstall 2024. I kept both versions because I have a lot of plugins, etc. that I don't want to reinstall.

[IanB_360]

Hi @filmspezialist 

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,

Ian

[filmspezialist]

Here we go with the bug report as requested:

• Issue - When I am importing a m2ts video file into PP sound and picture of the video are out of sync (at6t least 18 frames). Outside PP picture and sound ate in sync

• Adobe Premiere Pro version number: 24.6.3 (Build 4)

• Operating system - Microsoft Windows 11 Pro Version 10.0.22631 Build 22631

• System Info: CPU, GPU, RAM, HD:

  • CPU 13th Gen Intel(R) Core(TM) i9-13900K, 3000 MHz, 24 Kern(e), 32 logische(r) Prozessor(en)

  • GPU (Intel-based Macs and PCs) Intel(R) UHD Graphics 770

  • GPU driver (PC) NVIDIA GeForce RTX 3060 31.0.15.3623

  • RAM 64GB

  • Hard Drive System: 2TB, Video: 8TB

• Video format:  m2ts file as imported from my Sony video camera (1920x1080, 5.1 audio)

• Workflow details: As soon as the video file is imported into PP picture and sound are out of sync

• Steps to reproduce - (Very important!) 

• 1. Get a m2ts file

• 2. Import it into PP

• 3. Double click on the imported file so that it opened in the source monitor

• 4. Playback the clip

• Expected result - The video should play with picture and sound in sync

• Actual result -  The video plays with picture and sound out of sync

[filmspezialist]

In addition here is an analysis of the m2ts file:

Allgemein
ID : 0 (0x0)
Vollständiger Name : V:\...20241022213353.m2ts
Format : BDAV
Format/Info : Blu-ray Video
Dateigröße : 4,38 GiB
Dauer : 27 min 40s
Modus der Gesamtbitrate : variabel
Gesamte Bitrate : 22,6 Mb/s
maximale Gesamtbitrate : 24,0 Mb/s
Bildwiederholungsrate : 25,000 FPS
Aufnahmedatum : 2024-10-22 21:33:53+01:00
Kodierendes Programm : Sony HDR-CX625

Video
ID : 4113 (0x1011)
Menü-ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format-Profil : High@L4
Format-Einstellungen : CABAC / 2 Ref Frames
Format-Einstellungen für CABAC : Ja
Format-Einstellungen für RefFrames : 2 frames
Format settings, picture structure : Frame
Codec-ID : 27
Dauer : 27 min 39s
Bitraten-Modus : variabel
Bitrate : 21,3 Mb/s
maximale Bitrate : 22,0 Mb/s
Breite : 1 920 Pixel
Höhe : 1 080 Pixel
Bildseitenverhältnis : 16:9
Bildwiederholungsrate : 25,000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scantyp : Interlaced
Scan type, store method : Interleaved fields
Scanreihenfolge : oberes Feld zuerst
Bits/(Pixel*Frame) : 0.411
Stream-Größe : 4,11 GiB (94%)
IrisFNumber : 2.200000

Audio
ID : 4352 (0x1100)
Menü-ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Codec-ID : 129
Dauer : 27 min 39s
Bitraten-Modus : konstant
Bitrate : 448 kb/s
Kanäle : 6 Kanäle
Channel layout : L R C LFE Ls Rs
Samplingrate : 48,0 kHz
Bildwiederholungsrate : 31,250 FPS (1536 SPF)
Compression mode : Lossy
Stream-Größe : 88,6 MiB (2%)
Service kind : Complete Main

Text
ID : 4608 (0x1200)
Menü-ID : 1 (0x1)
Format : PGS
Codec-ID : 144
Dauer : 27 min 39s

[Kevin-Monahan]

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

[John Ellenberger]

Not really.

As noted in my original post I figured out it was a bug by using the
previous version.

[Rach McIntire]

Hi @filmspezialist ,
Thanks so much for all this great information.  It will help us try and reprodue your issue so we can help resolve it.
A few more questions for you:
Are you NVIDIA drivers the most recent versions?
Also, what method are you using to import the footage?
Where/ how are you storing your media?
Best,

Rach

[filmspezialist]

@Rach:

1. Yes, the NVIDIA drivers are the most recent one

2. Importing into PP is either done by using the "Import" function or by just double clicking in the project window

3. My m2ts files are stored on the harddrive of my PC

[Rach McIntire]

Hi @filmspezialist ,

Are you able to send me one of the files that you're having trouble with?
Also, did the folder structure change at all?
Best,
Rach

[filmspezialist]

@Rach: if you let me know how to do it I can send you a m2ts file.

And no, the folder structure was not changed at all.

[Rach McIntire]

Hi @filmspezialist 
We can confirm this as a reproducable bug and our team is looking into it.
In the meantime, other users with this issue have made proxies and had no issue.  Hopefully that workaround will work for you.
Best,
Rach

[RyanShepard]

@blackrosekillerIn my experience you can have several different versions of Premiere installed at the same time and each will received updates as they are available without interfering with the other versions. You can also uninstall any version without interfering with the others. Right now I have 3 versions installed because of this issue and each one gets their own updates through the Creative Cloud app.

[RyanShepard]

@Kevin-MonahanThanks for the information, I'll keep an eye one for the update.

[Jeffrey35960360wwfj]

I can confirm the issue is happening in V25 as well. I work at a university where students edit video projects using Premeire Pro in shared computer labs. Performing some type of campus-wide rollback to V23 is out of the question. It is also unrealistic to tell students to transcode their video files before editing in Premiere—especially when they're new to video editing. 

Adobe needs to fix this ASAP. It is absolutely ridiculous. 

[filmspezialist]

@Rach: thanks very much for getting into this. How do we get to know when the bug has beeen eliminated?

My current workaround is as follows: 

1. Importing the m2ts file into PP

2. Seperating picture and sound in timeline

3. Adjusting sound by 18 frames

4. Combining sound and picture again in timeline

[LluisV]

I had this issue a week ago and I fixed it deleting all cache files in the temporary folders.

[kostaskealar]

btw...u cant transcode using media enconder......as missed to mentioned.....cause obviously using the same way "seeing" the video....need to transcode using other  app outside the Adobe Universe..

[Rach McIntire]

updating status

[Rach McIntire]

updating status

[wxthings]

MTS files from existing projects load in Premiere as offline with "Media Mismatch" error on new computer running Win 11 Pro 24H2 and Adobe CC 6.4.0.361. If I manually add MTS files to Premiere Pro 25 or Encoder 2025 or After Affects 2025 the audio is ignored (stripped away). I've manually and auto-deleted all cached media files. I've uninstalled and reinstalled the apps. I've tried loading the same project, as well as MTS files and new projects with the MTS files in vers 23 of Premiere, with no success. It's too late for me to roll back Win 11 Pro 24H2 Build 26100.2161 on this new computer.

This is happening on a HP Z2 G9. Meanwhile, on my Dell XPS 8960 running Win 11 Home 23H2 and CC 6.4.0.361 I have no problems with CC or Premiere. I've been a Premiere user for over 25 years so I have a pretty good sense of what a bug or conflict is!

[Ann Bens]

https://helpx.adobe.com/premiere-pro/kb/troubleshoot-MTS-files.html

[wxthings]

Thanks. Unfortunately, I tried all 3 of those (again) and none of them worked.

[blackrosekiller]

@rachrachAny update on this? I had to roll back from PP 2025 to PP 2024 because of this issue and now suddenly, after clearing my media cache tonight PP 2024 is doing it on all of my projects including ones I never had an  issue with before. This is really bad and is making me rethink my decision to renew my subscription in December. I hear a lot of great things about Davinci. I have used Adobe since it first came out years ago. I hate to think of having to switch after all these years but this is a serious show stopper.

[Rach McIntire]

Hi @blackrosekiller ,
Our engineering team has the bug report and is working on it, but I don't have an update beyond that.