Tranquillity Base > AV Sync Fix
AV Sync Fix
Current Version 1.6
What is AV Sync Fix

AV Sync Fix allows you to fix unsynchronized audio/video of movie files.

It does not edit actual encoded media sample data. It edits time-mappings. You can immediately recognize the modified synchronization and save it without loss of audio/video quality.

There is no need to export modified movie files. You can overwrite them. The process of saving, without re-encoding, is very fast.

When you open a movie file, it will be copied as a temporary file for editing to the storage of your Mac. It may take a few minutes to copy depending on the file size. The requirements of available storage space size is more than twice the file size. The copied file will be deleted when the main window is closed or the app is terminated.

System Requirements

macOS X 10.12 or later

Supported formats

・QuickTime Movie (mov)
・MP4 file types (mp4, m4v)

AV Sync Fix cannot open files which require any conversion or codec components in QuickTime Player. Or nothing will be displayed.


Please backup your data before using this app.

Version History

Main Window 1
Main Window 2