Correct Audio Sync Errors

Correct Audio Sync Errors

Tools: Windows Media Player Classic and NanDub

This is a short tutorial for correcting audio sync errors using Media Player Classic and NanDub.
Here is the link for these programs: Audio Sync tools

Open Media Player Classic, looks like Windows Media Player, but is actually a sophisticated little media player.



Move the slider at the bottom to a point in the film where you can easily check the audio sync.
Pause the video, on the toobar go to Play, Audio, Options. Click on Audio Switcher under Filters, and check the box for Audio Time Shift



Now you have to put in a little work, if the Audio is before the Video, enter a + value, it the Audio is after the Video, enter a - value. I start with a 1000 ms, remember this is just one second, click apply and ok. Play the video and check the sync, adjust as necessary. Pause between tries so you don't have to refind your spot. Sometimes this can take awhile, just be patient and when you have adjusted the Audio to sync with the Video move the slider ahead several times to make sure it holds true for the whole file. I have had to adjust as much as 6000 ms before, so don't be afraid to put in big numbers, just make sure you don't go past your sync.



Once you get your Audio in sync you can close Media Player Classic
Open NanDub,
Go to File, Open Video File, and open the avi.



Click on Audio, Interleving.
Go to the Audio Skew Correction, Delay Audio Track and enter the value you have from Media Player Classic



Click OK, check Audio, Direct Stream Copy is checked, should be. Important, go to Video, make sure that Direct Stream Copy is checked, Not Full Processing Mode. Full Processing Mode will give you a 4 gb file



Now just go to File, Save As Avi, and rename the file. New avi file should have synced audio, be sure to check it.