Long-time Vegas Pro user, but first-time forum user - please go easy!
Here's the issue: all of a sudden, using VP23 (Build 302) .MTS files, upon importing to the timeline suffer an audio and video slip by 17 frames (video is 17 frames ahead of audio). Occasionally, clips appears on the timeline with an overhang (the video visibly extends 17 frames beyond the audio), in which case the sync is correct.
Yes, I can correct this with time-consuming manual re-slipping, or Handbrake conversion using the Constant Framerate option, despite the footage already being CFR. Both solutions are not tenable for me due to volume of clips I deal with and time constraints. My 4K files are unaffected.
I've thoroughly experimented with enable/disable legacy AVC encoding but with no result.
My work is solely multicamera concert shoots and I rely on a number of older HD camcorders for those extra angles (with 4K prosumer cams doing the bulk of the work).
After 12+ years without problems, this is suddenly an issue. Has anyone encountered this before? - please help!
These are the specs of the problem files:
General
Name: 00002.MTS
Folder: E:\[........................]
Type: Blu-Ray Transport Stream
Size: 2.08 GB (2,125,627,392 bytes)
Created: Wednesday, November 12, 2025, 1:33:41 PM
Modified: Wednesday, January 1, 2014, 6:02:54 AM
Accessed: Thursday, November 13, 2025, 11:41:30 AM
Attributes: Archive
Media information
Stream format: BDAV
Video stream #1
Video format: AVC
Resolution: 1920 x 1080 px
Aspect ratio: 16:9
Color depth: 8 bit
Frame rate: 25.000 fps
Scan type: Interlaced
Bit rate mode: Variable
Bit rate: 21318375 bps
Audio stream #1
Audio format: AC-3
Sampling rate: 48000 Hz
Channels: 2 channels
Bit rate mode: Constant
Bit rate: 256000 bps
Streams
Video: 00:12:36.600, 25.000 fps progressive, 1920x1080x32, AVC
Audio: 00:12:36.576, 48000 Hz, 16 Bits, Stereo, AC-3
ACID information
ACID chunk: no
Stretch chunk: no
Stretch list: no
Stretch info2: no
Beat markers: no
Detected beats: no
Other metadata
Regions/markers: no
Command markers: no
Media manager
Media tags: no
Plug-In
Name: mxcompoundplug.dll
Folder: C:\Program Files\VEGAS\VEGAS Pro 23.0\FileIO Plug-Ins\mxcompoundplug
Format: MAGIX HEVC
Version: Version 23.0 (Build 302)
Company: MAGIX Computer Products Intl. Co.
COMPUTER SPECS - using Win 11:
Device name DESKTOP-THRIB3O
Processor Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (3.00 GHz)
Installed RAM 128 GB (128 GB usable)
Device ID 8E94D27C-DA06-45D4-9340-8442D2BBF320
Product ID 00330-80014-41236-AA324
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display