AutoGK audio unsynched...

[dchakrab]

Hi all,

Did a search, didn't find anything directly related to AutoGK. My problem is the usual one, though...audio is out of synch.

Used AutoGK, followed the Doom9 tutorial, aiming for 2 CD's worth from one DVD movie. Got files approximately the right size, and now am trying to figure out what went wrong.

Since there's nothing posted on solving this problem in AutoGK, does that mean i should use a different program / suite for this? I didn't see many options in AutoGK that could solve the problem.

Does this mean i'm going to have to go back and figure out my issues with Gordian Knot? Or is there a simpler way to fix this?

All help appreciated, as always. Apologies for the newbie questions.

Dave.

[manono]

Hi-

Sometimes it just happens, and I don't know the reason. Not your fault, or AutoGK's.

But it's easy enough to fix. Open the completed movie in VDubMod. Set Video for Direct Stream Copy. Then go Streams->Stream List, and you should see your audio. Right-click on the audio and go into Interleaving. Here is where you adjust the Delay. Estimate the Delay and set it. Then OK your way out of there, go File->Save As, and give it a different name. Wait a minute or two, and check the new version for audio synch. If it's not good yet, reopen the original movie again, and adjust the Delay. It may take 2 or 3 tries to get it right. And it's easier to cue on a sharp sound, like a door slamming, or a gunshot, rather than just on people talking. But if you can go find a close-up of people talking, that should do to help you figure it out.

I'm assuming this is MP3. If it's AC3, then I recommend also setting Preload and Interleaving both to 96 ms. Good luck.

[dchakrab]

Oh, thanks...that seems much easier than i thought this would be. No re-conversion involved? Great.

Will post back with results later tonight, when i'm back at my home pc.

Dave.

[manono]

Nope, no reencoding necessary. You're just moving the audio around in relation to the video.

[dchakrab]

You sure there's not way to fix this in AutoGK?

The reason i ask:

I just tried a completely new encode last night (didn't have the time to stick around and try moving the audio) with a different DVD, and had the exact same problem...the audio's off from the video. Different DVD, new rip, same process as before, same problem.

Is there anything i can try in AutoGK to prevent that? To get this problem on 2 out of 2 attempts would seem to indicate there's something wrong with my encoding settings, no?

Dave.

[manono]

Hi-

Now I'm beginning to suspect playback problems, if this happened twice in a row. If you have a weak computer it might happen. What player are you using (and don't say Windows Media Player). Maybe try a less resource hungry player, like BS Player. If you have a friend that you can try one of them on, or a different computer, you might do that. And you're playing these from the hard drive, aren't you, and not from the CD?

AutoGK reads the delay from the audio file name, so it's not supposed to happen. And there's no way to adjust it in AutoGK. That's why it's AutoGK.

Are you decrypting correctly in DVDDecrypter? Using IFO Mode as you should? Have the latest DVDDecrypter? Make sure you have it set up properly:

http://len0xmirror1.serveftp.net/~len0x/tutorial/AutoGK.html#3

And if there's anything unusual about the DVDs-bootlegs, or made by a cheap company, then you might try a well known movie from one of the major studios to confirm this bad problem.

Forgive me for asking basic questions. It's sometimes hard to judge the knowledge level and experience of all the members.

[kurdi]

I sometimes have the same problem using Gknot. I've converted over 100 DVD's into DivX and probably had around 3 or 4 that were out of sync.

My question: is there any other way to get the audio to be in sync beside the one described above? Any software tools that people might recommend that might make the process easier?

[dchakrab]

Knowledge level: absolute, utter, complete, Newbie. Note the capital "N".

Have the latest versions of everything, since i just downloaded them all. I tried the files in Media Player, which i assume is sin # 1, and will try them in BSPlayer next. Not sure about settings for the rip...followed the tutorials on Doom9 for everything.

Will post back with results...might take a while to get everything together and experiment some more.

Thanks!

Dave.

[manono]

Hi-

is there any other way to get the audio to be in sync beside the one described above?

Yes. While there's no software that will tell you the delay automatically, you can use Media Player Classic (http://www.doom9.org/Soft21/Players/mpc2kxp6478.zip). Open the movie in that, and then go View->Options->Audio Switcher. Check "Audio Time Shift", set the Delay, hit "Apply", and then "OK". Resume the movie and see if it's right, and adjust some more if it isn't. A positive number delays it, and a negative number advances the audio. And of course, 1000 ms=1 second. Then, after you have it right, use that same number in VDubMod to resave the file following the instructions in the earlier post.

[isoman2kx]

I'm sorry to bring this thread back up guys.

Autogk has been great (ripping to nice sizes such as 1400 mb)

but I had a question manono or for anyone on the media player classic suggestion

I'm not sure what to do , wish there was a program that told you audio delay hehe.

but on using media player

ya said the only way to judge it is to look at doors slamming and such, are there any other suggestions?

Because in the close up conversions (which is what I actually started to look at) I can't tell the difference, I know its off, but its so slight that .3 tenths of a second (300 ms) looks like -.3 tenths of a second (-300 ms) to me.

How can I more accurately get a fix for how off the audio is?

[manono]

Hi, and welcome to the forum.

Yeah, it's a bit tricky to get it right, and of course you won't get it exactly right anyway. But you can't tell the difference between setting it to 300 ms and -300 ms? Six tenths is a big difference, and anyone should be able to tell. It's usually said that you can start to tell differences greater than 100 ms, but some people are more sensitive to audio asynch than others.

You seem to be saying that MPC isn't adjusting the delay at all. To confirm that, set it for something really big, like 2000 ms, and see if that made it go really out of synch. Assuming that worked, then reset it to zero, and watch the movie until you can estimate the amount of delay. If the sound happens before the lips move, then you set a positive delay. If the sound trails the lip movement, then set a negative delay. If you're not that sensitive to it, then get someone to help you with it.

Also, make sure you're playing the video off of the hard drive, and not from the CD. And you can also put the video on another computer to make sure it's not a playback issue with your computer.

How can I more accurately get a fix for how off the audio is?

Sorry, if there's another way besides eye/ear coordination, I don't know what it is. Maybe someone else does. When I've had to do it, which hasn't been often, it just "feels" right when it's back in synch.

[isoman2kx]

I have tried setting to it to extremes, but it seems maybe now that I'm desensitized between -200 ms and 200 ms lol.

Oddly enough, +/- 300 ms to +/-1000 ms I can definitely tell differences.

will try your tips in your post

thanks for the warm welcome and all the help

this forum's great :)

[O Maldito]

I have had problems with AutoGK v 1.0 audio synching similar to others reported in this thread. In backing up more or less typical commercial DVDs to DivX I have found frequent cases where audio is encoded out of synch. In each case the time shift has been different - sometimes positive, sometimes negative - once more than 30 seconds. In each case the rest of the process seemed OK and VirtualDub was able to synch the audio as recommended earlier in this thread.

The synching process is slightly tedious, however, and I don't feel as comfortable with my informal efforts - browsing around in a title for good synch points, stopwatch in hand - as I do with those of professionals assembling the original material using professional procedures.

I do not think that either the player (up to date WMPv9) or resources (CPU, RAM, disc) on my encoding machine are likely to be causing this problem.

With this in mind I re-encoded several of the problem titles using both FairUse and FlaskMPEG. While I do not like either of these as much as AutoGK and have not been able to get as good video quality from them as AutoGK effortlessly produces, both of them did produce perfectly synched audio in all cases.

What might be the difference in approach causing AutoGK to mis-synch the audio?

[manono]

Hi-

I suspect there's something else at work here other than AutoGK being to blame. Let's start with the decrypting process. Are you using DVDDecrypter in IFO Mode as you should? It's not the default setting, and if you're not using it in IFO Mode, then that will explain the problems all by itself. And are you also making other changes in DVDDecrypter as detailed in the Guide? (http://len0xmirror1.serveftp.net/~len0x/tutorial/AutoGK.html#3)

A couple of more things; when adjusting the delay in VDubMod, and if the audio is MP3, make sure to hit "No" when it gives you that stupid message after you open the movie. Or use NanDub. If the audio is AC3, then you might try with 96/96 ms Preload and Interleave values, rather than the default 500 ms/1 frame.

[O Maldito]

Interesting you should mention IFO mode for DVDDecrypting. In my first experience with this I found AutoGK reporting "invalid IFO format" (or some such) when it tried to use the decrypted data.

More or less by accident I tried decrypting in "file mode." That worked (with audio in synch) and, after another attempt to use IFO mode on a different DVD with the same "invalid" result I have been using file mode ever since - successfully except for the occasional audio synch problems.

I will recheck things here more carefully and follow up with the results but if anyone has observations on this in the meantime I will appreciate seeing them. Thanx - O M.

[O Maldito]

Follow up to my previous post: I have just done an IFO mode decryption of a DVD and AutoGK is happily encoding it. I am quite sure the audio will be fine (although I will check it).

I can see (dimly) how file mode decryption (with the desired VOB chain isolated in AutoGK's input directory) might have caused audio synch problems.

What I don't see is why my first two attempts at IFO mode decryption failed (I followed the DVDDecrypter 3190 IFO setup instructions in the AutoGK guide - the checked boxes were correct - just as I had left them in my earier attempts).

Forgive me if I have cluttered up this thread with the results of not following the instructions in the excellent guide to the equally excellent AutoGK software - feel free to edit out or move my comments and questions. Regards - O M.

[manono]

Hi-

I can see (dimly)...

When you use File Mode, you're liable to get some stuff before the main movie without any audio, production company logos and such, and that will throw off the audio for the movie. This doesn't happen every time, or even very often. Maybe 1 in 10 times. But it's enough to cause you no end of aggravation when it does happen.

What I don't see is why my first two attempts at IFO mode decryption failed...

Me neither. Maybe you had another DVD Decrypter already installed. Maybe the installation went bad for some reason. Try and reinstall if it happens again. Or download a more recent version (it's 3.2.1.0 now).

Forgive me if I have cluttered up this thread...

Nah, it's a common problem. Doesn't hurt to repeat the solutions from time to time. Good luck.

[idicula]

i had audio synch problems, but like the u guys were saying i missed the ifo part of dvd decryptor and the audio was off sync as soon as the FBI warning came on