DiVX to DVDr - Audio Sync problems

[djbenz]

Ok, so I'm trying to convert a DiVX movie to DVD format. I've done one successfully using the guides here and bristling with pride for getting it to work I set about doing my next one.

However, when I try to extract the audio to .WAV in Virtualdub I get this :



And sure enough, when I convert to DVD format with TMPGenc, the sound is out of sync, probably about 1/2 a second at the start of the movie, then getting worse throughout.

Any ideas on how I can re-encode this with perfect sound?

Cheers,

DJ

[Tommyknocker]

Here

[djbenz]

Thanks for that TK, but the sound is fine in the DiVX. Is this the only way to fix the sound, or is there something simpler I can do to extract the audio and process with the video?

Cheers,

DJ

[bugster]

Another option that I find works well in this situation is to use goldwave. This will open your avi and allow you to save out the audio as uncompressed wav. If doing this in vdub is not working for you give goldwave a try.

[djbenz]

Thanks Bugster! I found the same(ish) advice in another post, but just to extract a full uncompressed WAV in Vdub - and that worked. I've got a few DiVX's to do now, so if Vdub won't work with any of them I'll try goldwave.

Cheers,

DJ

[djbenz]

OK, Can someone help me understand this please?

The screencap above was when I opened movie A in Vdub. I extracted a full uncompressed WAV and re-encoded to DVD with TMPGEnc and everything was sweet.

I then tried movie B, which has the same message except the skew is 12688ms. I did exactly the same thing, but this time the re-encode is still well out of sync.

What exactly is happening? And is there an easy way to fix it?

I also tried to adjust the audio gap in the source range settings with TMPGEnc, using the 12688ms figure but it just got worse even when I tried +12688ms or -12688ms.

Help from the gurus most welcome please!!

DJ

[bugster]

As I suggested, try Goldwave. Virtualdub is an excellent program in many ways but does occasionally have difficulties. Goldwave is a dediacted audio editor that happens to be able to open avi's and extract the audio track from them. Try it, it may help.

[djbenz]

I tried goldwave too. It extracted a WAV exactly the same size, byte for byte as Vdub did, so I didn't try it. Do you think the same size file extracted by Gwave would work?

This is soooooooo infuriating! The DiVX is PERFECTLY in sync. I've done two other films DiVX to DVD and they've been spot on so I can't understand why this is happening on my third.

Also, Goldwave reports the audio track as 1:32:57 and Vdub reports the video stream as 1:32:57, so where the hell does the sync problem come in?

Thanks for the help Bugster!

DJ

[djbenz]

Anyone? I know someone must be able to explain this!



DJ

[djbenz]

No-one?

[hxc3634]

I transcoded DIVX movie into CVD (352 * 480) without any problem using TMPGenc. You can load Divx movie into TMPGenc but before load movie you need to set under Option->Environmental settings->VFAPI plug-in and right click on the DirectShow Multimedia File Reader and increase the priority to 1 or 2 and try open the video. If it work you don't have audio sync problem. I did 5 divx movies this way and no audio sync problem but when I try to load divx movie into VirtualDub I got the similar error message as you got. So try this way!

[djbenz]

Thanks for that advice. I'll bear it in mind for the future.

I played with the audio gap correct value in TMPGEnc and managed to get the audio matched perfectly. Audio was about 0.5 sec ahead of the video throughout.

It's nice to get a successful conversion, but it would be even nicer to understand why the audio & video are out of sync, even though they are the same length.

My next conversion will be an XViD encoded DiVX, which Vdub reports as having a 129474ms skew in the audio, so god knows how that one will end up!!

Sincere thanks to everyone who's tried to help on this one.

DJ