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How to fix audio out of sync in a DVD without any reconverting
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Baldrick
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Joined: 09 Aug 2000
Location: Sweden
Post Posted: Oct 15, 2009 04:44 Posts Comp View users profile Send private message Reply with quote
This will guide will describe how to fix audio sync in a DVD without reconverting and keeping the menus,extras. I will just describe how to fix a constant out of sync where it's the same out of sync in the entire movie. You can use similar method to fix progressive out of sync where the out of sync get worse and worse but you then need to adjust the delay several times in an audio editor.


Tools
Media Player Classic
PGCDemux
Muxman
Vobblanker
delaycut
All the above tools are FREE!


Preparation
Open the first VTS_0X.00.vob from the DVD using Media Player Classic and PLAY the video and at the same use the + or - on the keyboard to see how much you have to adjust the audio delay.



Guide
We start by separate the video and audio from the DVD using PGCDemux.
Open the VTS_0X_0.ifo from the original DVD VIDEO_TS folder in PGCDemux.
Choose to demux video and audio streams and choose the main PGC Title.
Process!


If the delay is small, -300ms to 300ms or less, you can now make a new DVD directly using Muxman. If the delay is more than 300ms see below.
In Muxman choose the video .m2v file and audio .ac3/.wav/.mp2 file.
Set the delay you checked in Media Player Classic.
Start.



Last we add add back menus, extras using Vobblanker. You can skip this step if your source didn't contain any menus or if you just don't need menus.
Open the original DVD VIDEO_TS.IFO in VobBlanker.
Set the output folder.
Select the main VTS_0X*.VOB and then choose the main titleset you want to replace with new created DVD.
Click on replace and choose the NEW created DVD VTS0X_00.ifo from muxman.
PROCESS!!


Done.

You can now burn the new DVD using for example ImgBURN.



Problems
If the delay is greater than 300ms then we need to fix it before using muxman. If your audio source is ac3 audio you can use DelayCut. Just open the ac3 and set the delay. Then continue with muxman as describe above. Choose the new created ac3.


If your audio source is wav or mpa/mp2 audio use instead Audacity to insert silence or cut it.


Thanks to manono for most of the ideas for this guide.

manono
Member


Joined: 28 Aug 2003
Post Posted: Oct 15, 2009 06:18 Posts View users profile Send private message Reply with quote
Baldrick wrote:
Thanks to manono for most of the ideas for this guide.

I thought as I was reading along that the process looked familiar. Now guns1inger, I, and others, won't have to explain the process any more - we can just point to this guide, complete with pictures. Thanks!

The users will probably also want to get the Celltimes.txt from PGCDemux (it contains the chapter points) and then add them back in during the Muxman step with File->Import Chapter.

Also, although Audacity will work well to adjust a delay in PCM WAV audio (and I'm the one that suggested using it in my post), I had forgotten that DelayCut works not just with AC3 audio, but also with WAV, MPA, and DTS audio.

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