out of sync audio?

[wibblyone]

Thanks to the help I got from an earlier post my initial problems have been solved, but im now experiencing an audio syncing problem. I have been using GKnot 0.27 to try to convert a 16:9 pal 25fps movie into DivX 5 format with a single 160 kbps mp3 soundtrack. I am using two passes. The files that should be created during the process all seem to be there, are the size I have specified, and the log shows no errors.
However, in WinDVD 4, the audio begins before the movie starts playing, but after a while the video seems to speed up and the audio lags behind. Using DivX Player 2.0a, there is no sound at all. After several of these attempts, I opened the final movie file in VDub and noted the error message 'VirtualDub has detected an improper VBR audio encoding in the source avi file', so I searched for other threads in the forum with this message and deduced the problem must occur during the muxing of the audio and video tracks. My most recent attempt doesnt produce this error but still suffers from the problem described above.
I have tried to rip the movie with a variety of audio settings. For example, I read in these forums that VDub doesnt handle variable bitrate mp3 soundtracks well, so I have tried to to use the expert settings to specify a switch (-b 160 -h) for lame that was intended to produce a constant bit rate mp3. I also tried 'just mux', and 'finally mux'. None of this has fixed the problem.
I fear I am missing the glaringly obvious, and risking the wrath of all the ppl here who know wtf they are doing, but any suggestions woud be greatly appreciated. If there is a way to manually mux the .avi and .ac3 files (I must have had the 'delete .wav' box checked when I last tried as no .mp3 or .wav is present in the output dir) I'm willing to have a go at that too.

[|minister]

as far as the muxing of .avi and .ac3 goes check this guide (http://www.doom9.org/divx__ac3.htm) out.

also this guide (http://www.doom9.org/virtualdub_procedures.htm#mansynch) is very useful for doing manual synching in virtualdub. hope this helps :)

[manono]

Hi-

The DivX player is useless and VDub doesn't support VBR MP3 or AC3. So you can't learn much from those 2. If you open it in NanDub, you won't get that message. Have you tried to use another player (such as BS Player or WMP 6.4) for playback to see if the player is at fault? If it's still asynch, then remux with Nandub (with default interleave settings for MP3 and 96 .ms/96 .ms for AC3), or use minister's link for the AC3. If it's still asynch, then the link that minister provided will help synch it properly (but do it in Nandub and not VDub). Others sometimes report problems with VBR MP3, but I've never seen them myself.

[2ndson]

I've recently had this problem and solved it with the help of a great little app called "AVIInfo" from Terabit Software. Even a muppet like me can now get everything in sync; it's quick, simple and user-friendly. Give it a try.