My investigations into audio sync issue

[thegreatnorth]

I was trying to convert my season 7 of SG1 all yesterday and thought it was just me having problems... so I came to the forum to see what is with the audio sync issues. I was using 7.0.4.0, then I tried a few of the betas up to the latest one (7.0.5.5) and the audio was always out of sync no matter what settings I was trying.

Now that I've read this I will try with a disc from season 1 and see what happens.

Just did a test convert of all three videos from Stargate SG-1 Season 1 Disc 1 and there were no audio sync issues in any of the videos.

Method
-DVD to DVD (Harddisk folder DVD9)
-DVD to mobile (AVI generic.avi.xvid.mp3 - framerate = same as source)

Tried again on Season 7 Disc 1 and no matter what settings I try the audio will not sync. Just installed MediaInfo and will investigate to see what the difference is between the seasons.

[thegreatnorth]

You are not alone. I noticed the sync issue back in Nov 09. I was converting Stargate SG1 for playback on a media player. All seasons converted fine, but seasons 6 and 7 had sync problems. I worked on it for weeks and nothing helped. I went back to ver 5 and that didnt help, tried 2 other computers and that didnt help. The latest problems have been Planet 51 and the Princess and the frog. Tried the copying to hard drive in dvd9 mode and then converting. It worked for planet 51, but not for princess and the frog. Hate to say it but I tried converting the princess and the frog with a free demo from another company and it worked fine. Using the mediainfo is a new ideal and I havent tried it yet.
Good luck maybe you or someone will figure this sync thing out.

I was trying to convert my season 7 of SG1 all yesterday and thought it was just me having problems... so I came to the forum to see what is with the audio sync issues. I was using 7.0.4.0, then I tried a few of the betas up to the latest one (7.0.5.5) and the audio was always out of sync no matter what settings I was trying.

Now that I've read this I will try with a disc from season 1 and see what happens.

[Complication]

Posts about other software removed.

[midiwall]

...maybe I try 30fps?

Nope... still off at 30fps.

[midiwall]

I have two more titles that have trouble. In The Shadow Of The Moon and The Beach.

It's a different "trouble", it's still an audio sync issue, but it's small and static. In both cases the IFOs say the titles are at 23.970fps, the VOBs say 23.976fps.

Using the default generic.avi.h264.audiocopy profile with 7.0.5.1, the frame rate tracks what the VOB lists (i.e., 23.976fps) and the audio is off. I'm recoding them now with the same profile but forcing 23.970fps (i.e., what the IFO says) and I suspect that it'll be ok.

Well, that didn't help... In fact it looks like the sync got worse. So that would tend to imply that maybe I try 30fps? (or wait for Ting to rework this code from the bottom up...)

Good to meet you Mr. Gibson - and welcome!

[jrgibson55]

sync issues

You are not alone. I noticed the sync issue back in Nov 09. I was converting Stargate SG1 for playback on a media player. All seasons converted fine, but seasons 6 and 7 had sync problems. I worked on it for weeks and nothing helped. I went back to ver 5 and that didnt help, tried 2 other computers and that didnt help. The latest problems have been Planet 51 and the Princess and the frog. Tried the copying to hard drive in dvd9 mode and then converting. It worked for planet 51, but not for princess and the frog. Hate to say it but I tried converting the princess and the frog with a free demo from another company and it worked fine. Using the mediainfo is a new ideal and I havent tried it yet.
Good luck maybe you or someone will figure this sync thing out.

[midiwall]

I have been in touch with Ting and he has gone through this thread thoroughly and is incorporating all our testing into the testing of the rewrite of the DVD to Mobile engine.

No timeframe though.

That's awesome! Thank you Greg and Ting!

Do you want more info??? I have two more titles that have trouble. In The Shadow Of The Moon and The Beach.

It's a different "trouble", it's still an audio sync issue, but it's small and static. In both cases the IFOs say the titles are at 23.970fps, the VOBs say 23.976fps.

Using the default generic.avi.h264.audiocopy profile with 7.0.5.1, the frame rate tracks what the VOB lists (i.e., 23.976fps) and the audio is off. I'm recoding them now with the same profile but forcing 23.970fps (i.e., what the IFO says) and I suspect that it'll be ok.

[Justin]

I have been in touch with Ting and he has gone through this thread thoroughly and is incorporating all our testing into the testing of the rewrite of the DVD to Mobile engine.

No timeframe though.

Thank you so much. Their is definitely a lot of bugs in dvd-mobile at the moment.

[Bigford352]

Thank you Gregiboy you are of great help!!!!!!!!!!!!!!!!!!!!!!

[GregiBoy]

I have been in touch with Ting and he has gone through this thread thoroughly and is incorporating all our testing into the testing of the rewrite of the DVD to Mobile engine.

No timeframe though.

[AzDragonLord]

I will try using single-pass instead of two-pass next time I convert a file. At this point I'll grab at almost any possible solution!

It didn't help.

[AzDragonLord]

I will try using single-pass instead of two-pass next time I convert a file. At this point I'll grab at almost any possible solution!

[roadpebble]

Ha. Looked all over for that math information. It's here in this thread. But upon further review that may not be the problem. I thought that all of the successful copies were done from 29.97 frame rate files. This is not true. After using mediainfo to look at some of the other files that I have copied I see that I have actually copied quite a few 23.976 frame rate files. And these even had the frame rate disparity between the vob frame rate and the ifo frame rate. As far as I can tell, the files that have the audio sync problem have the same stats as others that come through just fine. I'm at a loss.

[roadpebble]

I have also been having the issue with the audio being out of sync. I have tried it on Versions 5.2.3.2, 6.2.2.0, and 7.0.4.0. All of these exhibit the same audio sync problem, or what seems to be runaway audio, the audio sync progressively gets worse and worse as the movie plays. This is, however, only true for DVD's with a frame rate of 23.976. I have encoded videos with a frame rate of 29.97 and had no problems with those. I had seen the thread that Midiwall is referring to. I wonder if it is an internal math problem in the program.

[midiwall]

now i am looking at super troopers i think there may be a slight audio sync issue so slight it is hard to tell and the frame rates are off on that one I wonder how to fix this?

I've looked closely at a number of movies and thought there may be a slight sync issue, it almost seems to be "the norm". But what we're talking about here is an issue that starts small, and ends up being _seconds_ off at a point 90min into a film. That supports Greg's theory about variance in sync rates.

There's an older thread here around this topic where the math was played out and it fits pretty dern well to what folks are seeing.

Dont know if its related but if I use 2 pass encoding on the movie "knowing" the audio is out of sync,however 1 pass and it's ok.

Interesting, and it could be a fix for some titles. But looking back through the variations I tried with Max Payne, it's not a fix for this title.