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Premiere Pro 2025 Version 25.0.0 doesn't accept .mts files with sound?

Forum|Forum|1 year ago
December 3, 2024
5 replies
12879 views

We just got a new PC with Premiere Pro 2025 Version 25.0.0 (Build 61). When I import .mts files and drag them onto the timeline there is no audio track (on a known good file - checked in VLC). We've got an older system with Version 24.6.1 (Build 2) that doesn't have any trouble with the same .mts file. I was able to convert the file to .mp4 using VLC and edit the program successfully in 25.5.0, but that's time consuming. Is there a way to get 25.0.0 to accept .mts files?

PC - Dell Precision 5860 Tower

OS - Windows 11 Pro for Workstations, Version 24H2

Basic steps - Import known good .mts file, drag from bin to timeline

Expected results - A video track AND an audio track

Formats

Correct answer Ann Bens

Its not a bug.

If you have a brand new W 11 installed, than that is correct: no sound.

W11 24H2 does not support ac3 anymore.

You will have to download or buy the ac3 codec and install it into Windows 11.

LeighG-CMT

Participant

If you have:

Installed both Major geeks codecs
Fixed the AC3 in AnWave and still not being able to open

and Premier 26 / Win 11 still isn't pulling in the audio track then get LAV filters from GITHUB - that fixed it for me:

Releases · Nevcairiel/LAVFilters - https://github.com/Nevcairiel/LAVFilters/releases/download/0.81/LAVFilters-0.81-Installer.exe

unfortunately, old projects using the MTS files are still appearing as OFFLINE, but re-importing the video clips again seem to work fine

Software Versions:

Premier: 26.01

Windows: 11 Pro 25H2 (clean install)

frankb64691954

Participant

Follow the steps on the link below to install the AC3 and AC4 codecs. Easy to do. Virus free. If you have tried to import files with AC3 audio into Premiere - make sure to delete them from the project - CLEAR THE ENTIRE MEDIA CACHE - and then after instaling the codecs below, reboot, restart Premiere - and then re-import the the files. You will have sound on them.

https://pouaridis.com/microsoft/fixing-ac-3-audio-issues-in-windows-11-24h2-a-quick-guide/

thxapproved2

Inspiring

I have Windows 10 still. All I get is scratchy 0dbfs bitstream noise with AVCHD files from a Sony camera.

Premiere 25.3.0.

What's the fix? I have a request in to me to edit some AVCHD footage... and I cannot. Still get audio natively in Windows if I open the file in Media Player. Why does Premiere no longer play? Yes, I even tried installing the codec packs just in case. ATTACHED is a file that demonstrates what the audio sounds like. (WARNING, it's loud)

AVCHDDolbyBitstream.zip

J

John242237733v3r

Participant

I have the same issue. Recording on a Sony PXW camcorder, editing on Premiere Pro 25.3.0. MTS files just have the scratchy static. Before it was just zero audio and now it's the noise.

sample_audio_glitch.zip

S

Sumeet_Kumar_Choubey

Community Manager

Hi thxapproved2 & John242237733v3r,

We're sorry about the poor experience. We're aware of this audio noise issue with MTS media in Pr v25.3 and are working on getting it fixed as soon as possible. For the time being, please use Premiere Pro v25.2 as a workaround. We will provide updates as the issue is addressed.

Thanks for your patience.

Sumeet

wxthings

Participating Frequently

Did installing the Dolby decoder completely fix the problem? I have the same issue on two different Win 11 computers. After installing the decoder, I do get audio on MTS clips, but the audio leads the video by about 20 frames. It may not be noticeable on nat sound clips, but it is painfully noticeable on spoken audio being out of synch. The visual clue to this in a sequence is no waveform appearing at the original end of each clip.

Averdahl

Community Expert

Unfortunately there are two issues at the same time here...

The first is that the audio is gone that could be solved by installing the Dolby decoder. The second issue is that Premiere Pro 25 do play back the Dolby audio out of sync, and that´s a bug in Premiere Pro.

I updated to 25.1.0 (Build 73) two days ago and the small testing i did then was positive. The clips i imported did playback in sync. I am not sure yet that it is fixed since Pr 24 behaved the same. In Pr 24 some imported clips played back in sync only to playback out of sync the day after.

If you have Premiere Pro 25.1.0 you can try to launch it while holding down the Shift key and in the Reset options dialog that pops up check Clear media cahce files and then click on Continue. Open the project when done and let the files conform fully until you start to edit the project. And if you have 25.0, update to 25.1.

The 100%-working solution is to download Premiere Pro 23.6.8 from the Creative Cloud app. But then projects made in 24 or 25 won´t open, but starting new projects is flawless.

Did installing the Dolby decoder completely fix the problem?

By @wxthings

wxthings

Participating Frequently

O.k, that was interesting. This happen probably because Pr 23.6.8 conforms the files and create a proper media database that then are used by Pr 25.1 when you import the project. Not sure but almost...

One more thing you can try in Pr 25.1 is to close all projects and go to Edit > Preferences > Media Cache and click the Delete button under Remove Media Cache Files. This will delete the Media Cache Database and will force Premiere Pro 25.1 to re-conform you files again. This often helps.

So when done, try to open a project in Pr 25.1 that you know have files that are out of sync. If it works you probably can skip Pr 23.6.8 in your workflow.

...However, if I import a project with MTS clips from Premiere 23.6.8 then the clips are in synch.

By @wxthings

When I do that, opening a project in Premiere 25.1 that was created in Premiere 23.6.8 correctly synchs the audio and video in MTS clips, but when I then try to import a new MTS clip into that Premiere 25.1 project, the audio and video continue to be out of synch.