How to Synchronize Audio in VLC Media Player
Open the video file, whose audio you want to synchronize.
In the Menu bar select Tools -> Track Synchronization.
This will open a window , select the Synchronization tab in the window.
You will see a window like this. vlc How to delay / advance Audio in VLC Player
In the shown control, you will be provided with option to increase or decrease the value.
Zero(0) means the sound and video sync will not be altered, a positive value means Sound will be advanced over video, a negative value means the sounds will be delayed compared to the video.
Change the value manually until the audio syncs with the video. This is a trial – error method.
VLC has no smart video – audio synchronization feature in it. (For that matter, hardly any media player has this feature)
Incase if the changes you have made have not come into effect, kindly stop the video and play it again.
Incase if the changing values are too high, you can specify your own duration by entering in the control box.