If VEGAS Pro crashes every time you import an .MTS
file with AC3 (Dolby Digital) audio, especially from Sony cameras like the SLT-A58, you’re not alone. This is caused by the removal of native AC3 codec support in newer Windows builds. Here’s how to solve it — for good.
The Error
When importing .MTS
clips:
- VEGAS crashes immediately
- Error:
Unmanaged Exception (0xe06d7363)
- Fault Module:
KERNELBASE.dll
These .MTS
files usually contain:
- Video: AVC (H.264) 1920x1080i, 25fps
- Audio: AC-3, 256 kbps, stereo, 48.0 kHz (Dolby Digital)
The Fix (with images)
Step 1: Download and Install AnWave
Get the codec fix tool here:
Download AnWave v6.10.17.26
Run the installer:

Click Install and proceed.
Step 2: Launch AnWave.exe
Navigate to the folder:C:\Users\YOURNAME\Desktop\AnWave-2024-6.10.17.26-Windows-x64\
Double-click AnWave.exe
Step 3: Enable Dolby Digital Atmos Support
In the AnWave app:
- Go to the System tab
- Scroll down and click Microsoft Dolby Digital Atmos Pack


This will install Dolby audio support back into your Windows system.
Final Step: Reboot and Test in VEGAS
- Restart your PC
- Open VEGAS Pro
- Import your MTS file — no crash, audio works!
Bonus Tip
Want to preview MTS files in Windows 11 directly?
How to open MTS files in Windows 11
Conclusion:
AC3 support is essential for editing older MTS files. AnWave and Dolby Atmos restore this capability without the need for risky codec packs. Worked perfectly for my Sony SLT-A58 footage in VEGAS Pro 21.
Let me know if you want a WordPress export version buddy, or if I should embed your YouTube link once ready!
Final Step: Test in VEGAS
- Launch VEGAS Pro
- Import your MTS file — it should already work without a reboot
- If it still crashes, reboot your PC and try again
Sure buddy, here’s a “Frequently Asked Questions” section you can add below your blog to boost SEO and traffic:
Frequently Asked Questions (FAQ)
Why does VEGAS Pro crash when importing MTS files?
VEGAS Pro often crashes when importing .MTS
files that contain AC3 (Dolby Digital) audio, especially on Windows 11 systems missing the AC3 codec.
How do I fix AC3 audio issues in VEGAS Pro?
Install the AC3 codec using the AnWave tool and enable Dolby support. This solves most import and playback issues.
Can I open MTS files in Windows 11 without converting them?
Yes, but you’ll need proper codec support. See this guide: https://izzylaif.com/en/how-to-open-mts-files-in-windows-11
Is AnWave safe to use for AC3 codec installation?
Yes, it’s an open-source utility trusted by many users to restore missing codec functionality in modern Windows builds.
Does this fix apply to other Sony cameras like A57 or A77?
Yes, if your camera records in .MTS
with AC3 audio, the same fix should work.
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These are the issues that this blog post solves.