How to Fix audio / video synchronization problems in MP4 Video Files?

It will be very annoying if the audio of your favourite movie that you downloaded, is behind or ahead of the video. No one can bear it even if the difference is only of one or two seconds. This is also called lip sync error that usually occurs when the video file gets corrupted due to some reasons.

Let’s see some of the reasons due to which synchronization issue arises –

Converting the file type – File format of any file is an important part of it. It not only tells us that which kind of file it is, but also helps the file to play properly. Sometimes, we try to change the file extension manually or using a third-party tool, in order to make it according to our need. This might make the file inaccessible as most of us do not perform this task carefully. This corrupted file will then produce various error messages like format errors.

Incomplete download – If the downloading of an MP4 file is left incomplete, then when you try to play that file it refuses to do so. This is because the file got corrupted & becomes inaccessible. In order to repair corrupted MP4 file, you will need an effective repairing tool that can make your important video playable once again.

Interrupted transfer – When you transfer video files from your system to an external storage device or vice-versa, if the transfer process gets interrupted, then there are chances that the files get damaged. The results can be an out-of-sync audio & video or the file becomes inaccessible.

Virus attack – Virus infections lead to the corruption of all the files that are encountered by the malicious data. Generally viruses enter through the internet or when you connect an infected device onto your system. So, an efficient anti-virus should be used in order to prevent this kind of infection. This tool works perfectly for both Windows & Mac operating systems, providing perfect compatibility with all their latest versions.

In all these situations, Fix MP4 comes as a rescuer. This tool is extremely efficient as it has been built with deep & advanced repairing algorithms. It has a very simple & wizard style interface that even a tech novice can easily operate. This is a non-destructive read-only tool as does not touch the original corrupted file, but makes a copy of it instead. The video & audio parts of the corrupted file copy are separated & then repaired. After repairing, they are joined back again to make a playable file that is corruption free. This software also helps you to retrieve damaged MP4 files after recovery

This software is compatible with all versions of Windows operating system, such as Windows XP, Vista, 7, 8 and Windows server 2003 and 2008.

Steps to Fix MP4 Audio/Video Sync Problems –

Step 1 – Download the demo version of the tool & install it.

Step 2 – Upon running the software, the main window is displayed. Select the corrupted MP4 file & click the “Repair”button.

Fix MP4 Sync Problems - Main Screen

Fig 1: Main Screen

Step 3 – The application will start fixing the corrupted file.

Fixing MP4 Sync Problems - Repairing starts

Fig 2 : Repairing process

Step 4 – After the repairing process is completed, a summary report is being generated. Preview the file.

Solving MP4 Sync Problems - Summary report

Fig 3 : Summary

Step 5 – Now save the file on a desired destination.

MP4 Sync Problems Fix - Save Repaired

Fig 4 : Save Repaired