AV Sync Fix

Name: AV Sync Fix
Price: 4.99 USD
Rating: 0 (0 reviews)
Author: Tranquillity Base

Fix out of sync audio & video

Only for Mac

$4.99

Ages

4+
Years
Category

Photo & Video
Developer

Tranquillity Base
Language

EN
+ 1 More
Size

3.1
MB

Mac

AV Sync Fix helps you correct audio and video that are out of sync in video files (MOV, M4V, MP4). You can adjust synchronization easily by dragging on the timeline, or more precisely by entering values. The app fine-tunes playback information—such as media start time and duration—to bring audio and video back in sync. When saving, no re-encoding is performed. Only playback information is updated, so there is no loss in video or audio quality, and even long videos are processed quickly and smoothly. ■ Storage Requirements When you open a video file, the app creates a temporary working copy of the original. The app requires free storage space of more than twice the file size. Copying may take some time for large files, but it enables efficient adjustments and instant preview of results. The temporary copy is automatically deleted when the main window is closed or when you quit the app. ■ Supported Formats • QuickTime movie (.mov) • MP4 file (.mp4, .m4v) But the app cannot open/play the following files. • Files that QuickTime Player cannot open • Files that require conversion or additional codec components to open in QuickTime Player • DRM-protected files such as movies or TV shows downloaded from the iTunes Store or TV app • Fragmented MP4 ■ NOTE! Please make sure to back up your files before using this app, just in case an unexpected error occurs.

Ratings & Reviews

This app hasn’t received enough ratings or reviews to display an overview.

Works great once you figure it out
12/26/2017

Gramsterix
No documentation to speak of and so figuring out how to use it can take a bit of time. I tried a couple of things and one of them worked and voila - my video was fixed. Would be five stars with proper documentation.In my case I saw the audio and video tracks had different lengths - I subbtracted these and set the audio to start at the difference, and that did the trick.
Works great once you figure it out
12/26/2017

Gramsterix

No documentation to speak of and so figuring out how to use it can take a bit of time. I tried a couple of things and one of them worked and voila - my video was fixed. Would be five stars with proper documentation.In my case I saw the audio and video tracks had different lengths - I subbtracted these and set the audio to start at the difference, and that did the trick.
I hate when software takes over
05/15/2020

joemag3
This software did help me correct some video sync problems. Unfortunately, though, double-clicking on a saved file causes AV-Sync to open, instead of Quicktime player. I hate it when software does that. It forces me to throw the app in the trash after every use, just so it will stop acting like the default app for all my movie files. Seriously annoying.

Developer Response
It seems that the default app of a file you saved is set AV Sync Fix. Most files have an assigned default app that opens the file when it is double-clicked in the Finder. You can change it for a specific file type. Please try the following to change it to QuickTime Player.1. Select a saved file in the Finder.2. Press command + I keys to show the file info window.3. Choose QuickTime Player in the "Open with:" pop-up button.4. Click the "Change All..." button if you want to set it for all other same extension files.AV Sync Fix does not set the default app of files to AV Sync Fix when saving.
I hate when software takes over
05/15/2020

joemag3

This software did help me correct some video sync problems. Unfortunately, though, double-clicking on a saved file causes AV-Sync to open, instead of Quicktime player. I hate it when software does that. It forces me to throw the app in the trash after every use, just so it will stop acting like the default app for all my movie files. Seriously annoying.
Developer Response 05/18/2020
It seems that the default app of a file you saved is set AV Sync Fix. Most files have an assigned default app that opens the file when it is double-clicked in the Finder. You can change it for a specific file type. Please try the following to change it to QuickTime Player.1. Select a saved file in the Finder.2. Press command + I keys to show the file info window.3. Choose QuickTime Player in the "Open with:" pop-up button.4. Click the "Change All..." button if you want to set it for all other same extension files.AV Sync Fix does not set the default app of files to AV Sync Fix when saving.

• Fixed an issue where edits to the file playback duration might not be reflected in the saved file • Performance improvements • Fixed some bugs

Version 2.56

10/16/2025

Data Not Linked to You

The following data may be collected but it is not linked to your identity:
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Privacy practices may vary, for example, based on the features you use or your age. Learn More

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Supports

Family Sharing

Up to six family members can use this app with Family Sharing enabled.

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AV Sync Fix

Fix out of sync audio & video

Ratings & Reviews

Works great once you figure it out

I hate when software takes over

What’s New

2.56

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Version 2.56

App Privacy

Data Not Linked to You

Accessibility

Information

Supports

Family Sharing

More by Tranquillity Base

Frame Grab