avi to DVD - audio sync issue

[Thasp]

I know how to do the conversions. I make my avisynth script and frameserve it into CCE which does my encode, then use ifoedit to mux the audio and video and create the vobs/ifos.

When I check the audio properties of the original AVI in virtualdubmob, it says there is 0ms delay in the audio stream. But it must be lying, since the audio is quite out of sync with the video when I set delay to 0ms in ifoedit.

I used besweet to transcode the mp3 to ac3.

I have authored DVDs with ifoedit before with no issue, but never from an avi, it was an HDTV MPEG2 source where I knew for sure what they delay was since dgindex puts the delay in the ac3 file that it demuxes.

Thanks for any help. :)

[manono]

Hi-

I hate to be glib, but set the delay, either in the authoring app, or with AC3 Delay Corrector before authoring.

[Thasp]

That is my issue. How do I know what to set the audio delay to? I have no indication!

[manono]

See if this post helps you to determine the delay:

http://forum.doom9.org/showthread.php?p=630610#post630610

[ammck55]

manono--Thanks for the link. I've looked for your audio delay correction tips lately, but since I've got Doom9 help folders strung across four different pc's, I never did locate them the last time I hunted. Guess I didn't dig quite deeply enough. :) If memory serves, it looks like you've thrown some new tools in there since I last looked at your work?

ammck55

[Thasp]

Apparently I assumed the avi was 23.976 FPS, not 29.970 FPS as it was which caused my video encode to be messed up which caused the out of sync video.

The issue is fine now. I can't believe I glossed over such a small detail. :(