Conversion out of sync

whiteshoes · Member Joined: 12 Dec 2005 Location: United Kingdom

i have an avi file which has no audio problems but when i convert it to dvd using vso divx to dvd after about 20 mins it goes out of sync by quite alot can anybody help please tia

guns1inger · Posted: Sep 15, 2006 08:51

open the avi in g-spot 2.60beta and check the audio. There is a good chance that the audio has been encoded with VBR MP3, which seems to cause sync issues with a lot of encoders. The latest version of ConvertXtoDVD (DivxtoDVD's big brother) has a lot less problems with it, but even it isn't immune.

If this is the case, open the avi in virtualdubmod (click OK to the VBR warning you will get), then go Streams->Stream List. Right click on the audio and select Full Processing. Right-click again and select Compression. Choose Uncompressed PCM. Click OK, then click Save WAV and create new file. The file size should be around 100mb per 10 minutes of footage (i.e. 90 minute file should produce a 900mb file, give or take a few MB). Once this completes, click on Add, and select your wav file. Click on the MP3 audio track, then click on the disable button. Click OK, then go File->Save as. Make sure it is set to Direct Stream Copy, and save a new avi file with just your new audio track. Finally, open this new avi file, and test it for audio sync. If everything is good, use this in DivxtoDVD and see how it goes.

Of course, if it isn't VBR MP3 audio, you have something else to worry about, so do a scan for bad frames in virtualdubmod at this point.
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whiteshoes · Member Joined: 12 Dec 2005 Location: United Kingdom

thanks very much for your time and effort...ur method has worked . the whole film is now in sync. once again thank you

Rhoads · Member Joined: 14 May 2007 Location: United States

what the hell?? this isn't what i posted.. i guess someone redirected me to this cuz they think i had this problem instead. well instead of doing the ridiculously long drawn out process gunslinger suggests. i just got winavi and it put it on dvd in like an hour with about 10 mouse clicks. thanks for the help slinger but i just really hate it when i have do download a bunch of stuff just to do something simple. i highly recommend winavi for it's easy use. and for burning, i recomend having nero but using dvd shrink.

CubDukat · Member Joined: 10 Apr 2001 Location: United States

I'm actually having the same problem, except mine is in reverse. I've ripped several DVDs over the past few months, and at least half of them are fine when played back from the HD as DVDs in PowerDVD and WinDVD. The problem comes when I try to convert them in either Divx Converter or AutoGK. They go severely out of sync. For instance, a recent rip of a Babylon 5 DVD had four episodes in one file, but the audio for the last episode would actually be heard during the first 20 minutes of the first episode.

I've been using both RipIt4Me and DVDFab HD Decrypter, but I thought I had heard somewhere that you were supposed to use those tools only when something like DVD Decrypter didn't work. If that's the case, is there a definitive list of which studios use which formats? I found a partial list of the studios that use ArCCos on Wikipedia, but there's no list that I know of of who uses Ripguard.

Also, the titles I seem to be having issues with are Warner Bros., Showtime and MGM titles.

guns1inger · Posted: Aug 23, 2007 02:10

If the DVDs play back fine on your HDD, then open them in Shrink and use Re-Author to separate out the episodes and convert each in isolation.
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CubDukat · Member Joined: 10 Apr 2001 Location: United States

jman98 · Member Joined: 08 Oct 2004 Location: Freedonia

CubDukat - Ripping is not your problem, per se. Ripping multi-episode DVDs and converting them is often problematic. The best thing to do would be to rip 1 episode at a time. You could use DVDFab HD Decrypter all the time if you wish because it will always work.

When converting, be sure NOT to use VBR MP3 audio. CBR MP3 audio is OK. VBR audio doesn't really save much disk space and all it does is cause sync problems for a lot of people. I wish VBR MP3 was never invented because it's caused too many problems for the miniscule space savings it gives.

kavesa · Member Joined: 10 Oct 2007 Location: Uruguay

Hi there, I have the same problem as the first post, but my gspot says I have a CBR mp3. In fact, it used to be VBR, but I recoded it before getting here, but the result was the same.
What I thought could have something to do with it, was the video codec, since it's the old DIV3 (DivX 3 Low-Motion), but I recoded it to xvid and it was still out of sync on the DVD.
Any idea?
Thanks
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guns1inger · Posted: Oct 16, 2007 18:15

In what way is it out of sync ?

1. Out of sync the whole way through by a constant amount ?
2. Starts in sync and drifts further out of sync over time ?
3. Drifts in and out of sync throughout ?

There are different reasons and solutions to each case. Without knowing your case, I can't tell you which approach to use.

The solution posted above is to try to convert the audio without introducing sync problems, but it does not fix sync problems per se.

1. Out of sync by a constant amount.

This is the easiest to fix. Open the avi in Media Player Classic. Use the + and - keys on the number pad to change the audio delay until you have the audio back in sync. Note the final delay. Open your avi in virtualdubmod and select Streams -> Stream List. Right-click and select Interleaving. Enter your delay into the field in the bottom half of the dialogue. OK your way back to the main screen. Make sure both video and audio are in Direct Stream Copy mode, and save a new avi. Test it and make sure the audio is now in sync.

2. Starts in sync and drifts further out of sync over time

Usually this occurs when frame rates are changed (poor PAL to NTSC/NTSC - PAL conversions can do this). Essentially you have changed the running time of the video, and not the audio. To fix this you have to alter the running time of the audio to match the new video running time, or re-encode the video using it's original framerate.

Software that will alter audio running time includes BeSweet, Audacity (note : Audacity can alter the running time, but this will introduce a pitch shift as well. You have to then adjust pitch in a separate pass), Sound Forge and Audition.

3. Drifts in and out of sync throughout

This one I have only seen from particularly troublesome VBR MP3 source. There is no simple solution. All I can suggest is try to convert it using a different piece of software - AVI Demux, DAudioK - or spend a day or so cutting the audio and rematching it in small segments. This is very time consuming and needs to be done in an NEL with a good timeline function.
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kavesa · Member Joined: 10 Oct 2007 Location: Uruguay

Hi, thanks for your reply, and clear instructions.
Let me tell you that it is a 90 minutes video, and as it has only music on the first minutes, only on minute 3 I get to measure the out of sync. At that time, it is less than a second, but to the end of the video it is almost 5 seconds.
On GSpot it says that it has 30.110 Pics/s and the same 30.110 Frames/s. I know NTSC uses 30 fps so I'm just off, but enough to make it wrong.
So next question is, could I use VirtualDubMod for instance, to change that 30.110 to 30 and then use the result to author the dvd?
Thanks again,
K!
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happynow · **Banned** Joined: 21 Mar 2008 Location: usa

I Use SPAM, it works pretty good .