MTS files in latest premiere pro

[rogey0101]

Latest premiere (25.3). Struggeling very hard with avchd files (*.MTS) . Can barely scrubb threw them. Previous premiere version (25.2) Works with them just fine. Tried to convert them to mp4 files, and still nothing. Tried clearing The cache.

Thanks

[Sumeet Kumar Choubey]

Hi rogey0101,

We're sorry to hear about this. We're currently investigating an issue with MTS media in the latest version. Could you please confirm if you are experiencing playback/performance issues or audio noise issues with MTS media? 

Thanks,

Sumeet

[rogey0101]

Thank you for your replay.

I'm having trouble only with playback/performance issues. The audio is fine

[Sumeet Kumar Choubey]

Thanks for confirming that. On which camera were these files captured, & what is the frame rate & frame size? Please also let us know the system specs (OS, CPU, GPU & RAM) & if you have applied any effects to the clips in the timeline.

-Sumeet

[rogey0101]

The files recorded on a cannon camera, 50 fps, 1920x1080 frame size.

System spec are Win 11, Intel i9-12900k, 64 gb ram, Nvidia rtx 2080 ti.

No effects applied.

[Sumeet Kumar Choubey]

Thanks for the details. Is this happening specifically with the MTS media or with other media types as well? Have you tried importing the media files into a new project & checked if it's working? Also, please share a screenshot of the Audio Hardware preferences window.

-Sumeet

[rogey0101]

It happens only with the MTS files, and in every project. Doesnt help to import it into a new project.

[Sumeet Kumar Choubey]

Are you using a USB-powered audio interface for the output? If so, for testing purposes, can you try disconnecting it and see if it improves the scrubbing performance? Also, is it only the scrubbing that is affected, or is regular playback of the timeline also lagging?

Thanks,

Sumeet

[rogey0101]

Im using a 3.5mm audio conector for my audio output.

And also the scrubbing is lagging and it takes at least 15-20 seconds after i hit play, to acatually start playing the footage in real time.. When it starts it plays alright but when i stop it takes another 15 seconds to start again.

I'll say it again, in all the previous premiere versions, it all worked fine. Maybe a little harder then other media but very unnoticable.. 

[12thavenue]

I cannot  get anything but static in the audio when I import MTS files from my Canon EOS C100 Mark II. I thought it might be a problem with my current project, but when I tried to import from previous projects files that had been successfully imported, I got the same result: static in the audio. Video seems fine.

[rogey0101]

I rolled back to premiere 25.2.3. Fixed it. I think its a bug in the 25.3 update

[Sumeet Kumar Choubey]

Hi rogey0101,

In the original post, you mentioned that even transcoding to mp4, didn't improve the performance. Can you please confirm if other non-transcoded mp4 files are working fine or if they are also showing the same behaviour? Also, would you mind sharing a sample media which performs well in v25.2.3 but not in v25.3? It will help us investigate the issue at our end.

Thanks,

Sumeet

[Sumeet Kumar Choubey]

Hi 12thavenue,

Sorry about the poor experience. We're working on fixing the audio noise issue with MTS media in v25.3. For the time being, you may use version 25.2 as a workaround. We will provide updates once the issue has been resolved.

Thanks for your patience.

-Sumeet

[Przemysław31206128xqfd]

I recently upgraded from Windows 10 to Windows 11 because Adobe Premiere was running too slowly. I even spent $2,000 on a new computer specifically to edit video more smoothly — including footage from my older Canon C100 camera, which records in the MTS file format.

Unfortunately, after importing the MTS files into Adobe Premiere on Windows 11 Pro, I encountered a major issue: instead of normal audio, I only get loud static noise in all clips.

I’ve spent hours trying to solve this — installing various codecs and researching solutions — but nothing worked. What’s even more frustrating is that Windows 11 plays the files with no problem, and on Windows 10 Pro with the exact same version of Premiere, there were no audio issues at all.

This is incredibly frustrating.

Many people in the industry have expressed similar frustrations with Adobe Premiere, and are turning to alternatives like Apple computers, DaVinci Resolve, or Sony Vegas.

Please do something about support for older MTS files from cameras like the Canon C100. These cameras are still widely used, and many professionals rely on older equipment in their daily work.

[NietzscheKnewBest]

I have the exact same issue 

Issue: Audio Distortion/Static with Sony PXW-X70 AVCHD .MTS Files in Premiere Pro and Media Encoder (2025)

Summary:
When importing .MTS files recorded on a Sony PXW-X70 (AVCHD, 1080p, 29.97 fps, audio: AC-3 48kHz stereo, lav mic via XLR adapter) into Adobe Premiere Pro 2025 and Adobe Media Encoder 2025 (tested versions: Media Encoder 25.3 and 24.6.5), the audio is heavily distorted or sounds like maxed-out static. The issue persists even after transcoding to ProRes MOV or MXF with uncompressed PCM audio using Media Encoder. These same files play back with clean audio in VLC, QuickTime, Windows Media Player, and DaVinci Resolve.

Reproduction steps:

1. Record video on Sony PXW-X70 with audio via external lav mic, saved as AVCHD .MTS (audio: AC-3 48kHz stereo).

2. Import .MTS file directly into Premiere Pro 2025, or

3. Transcode the .MTS file to MOV/MXF with PCM audio using Adobe Media Encoder 2025.

4. Import the transcoded file into Premiere Pro or play back in VLC.

Expected result:
Audio plays cleanly in Premiere and exported/transcoded files, matching what is heard in VLC or Resolve.

Actual result:
Audio is loud, static, and maxed out—clearly distorted or digital noise—in both Premiere Pro and exported files. The issue is present even with ProRes 422 HQ, PCM audio, and MXF or MOV containers.

Troubleshooting already performed:

• Verified original .MTS plays correctly in VLC, QuickTime, and DaVinci Resolve.

• Confirmed Media Encoder export settings: ProRes 422 HQ, PCM 48kHz, 16/24-bit, stereo.

• Cleaned Media Cache and reset Premiere audio hardware to 48kHz, no input.

• Issue occurs across multiple Adobe versions and persists on different machines.

• Re-wrapping with third-party tools (e.g., Shutter Encoder, ffmpeg) does resolve the audio problem, confirming an AC-3 decode issue within Adobe tools.

System Info:

• Windows 11, up-to-date

• Adobe Premiere Pro 2025

• Adobe Media Encoder 25.3, 24.6.5

• Sony PXW-X70 camera (AVCHD, AC-3 audio)

Conclusion:
This appears to be a bug or missing AC-3 decoding support in recent Adobe builds, affecting AVCHD .MTS files from the Sony PXW-X70 and likely other cameras. Many users with similar workflows may be affected. Temporary workaround is to use Shutter Encoder or ffmpeg to transcode the .MTS files before editing in Adobe apps.

Request:
Please investigate the AC-3/AVCHD import and transcoding workflow in Premiere Pro and Media Encoder 2025, and restore proper audio decoding for affected users.