Help Please MP4 and some AVI mpvies

[artinusa]

Hi,
Some movies have the sound poorly synched with the film. Is it possible to synch the sound in such movies. Can Avidemux do it and how. I see that VLC attempts not very well for me,  to do this but then how does one save such changes
TIA

[AQUAR]

If the sync error is constant you can shift the audio time line in avidemux.
Tick shift under audio output in the GUI and set the shift in ms.