AutoGK Audio Mismatch

[Umberger]

When encoding DVD's using DVD Decrypter and then AutoGK, the audio is always out of sync by a very noticible amount. I have tried several different audio compressions, both mp3 and AC3, and nothing I have tried has gotten it right. Am i doing something wrong, or is this a common problem? How can I fix it? I have tried several times, but at 3 hours a pop, it's getting rather tiring. Thanks in advance folks.

 

[Zugzwang152]

are you selecting your own video framerate or letting GK choose?

 

[Umberger]

i am letting GK choose. The only setting i changed was the audio codec. I tried it once on "auto" then on AC3. Same problem both times. I have also tried it with a single 700 MB output, as well as with a larger 1400 MB 2 file output.

EDIT: i'm using auto GK, and as far as i know, i can't change the framerate.
EDIT AGAIN: i'm using the XVid video codec, forgot to mention that earlier.

 

[BespinReactorShaft]

What movie is it?

 

[Umberger]

I have tried Braveheart as well as LOTR, the fellowship of the ring. Both have the same problem.

 

[Umberger]

anybody?

 

[SelArom]

I remember having this problem a long time ago... I think it had something to do with the audio sample rate, 44.1 instead of 48 or vice versa... I don't really remember if that was it but it might help to check that somewhere

that's all I got
-SelArom

 

[Gurck]

I prefer regular (not auto) Gordian Knot, so I can't tell you what to do differently using the auto version for future encodes to come out right - but I can say that I've found audio skew in the finished avi to be a generally easy fix using Virtual Dub. How to do so depends on the type of skew - is the audio off by a set amount or does it increase or decrease as the movie goes on?

 

[Umberger]

Thanks for the input, SelArom, I'll look into that.

Gurck,
it's off by an increasing amount. a fraction of a second near the beginning, more and more as it approaches the end. i'll look into using virtual dub. let me know if you have any other advice.

thanks.

 

[Gurck]

If you haven't already, download Virtual Dub here - it's free. To fix the skew you're describing, open the file in vdub, go to file -> file information, and take note of the fps (it should be in the first line). Now go to video -> frame rate, and look at the third option down, "change so video and audio durations match (xx.xx fps)". If this fps number is not equal to the framerate showed in file information, check this option, then go to video -> direct stream copy, then file -> save as avi -> give it a name & click save - this should do it. If the numbers do match it's the more difficult type of skew to fix, and while it's still doable with v.dub and an audio editor, you might not want to bother. If this is the case and you do want to bother rather than try reencoding, let me know.

 

[Umberger]

Thanks a lot man, I'll give this a try later tonight when I have time. I really appreciate the advice.