Why is the sound out of sync on dvd but not before rendering

[DVD Newbie]

Hi there

Using ULead VideoStudio 7 I have editied my project with muisc as a background and spent days getting the pictures in sync with the music. When I play the project in Ulead it is fine, when I create disk you have the option to see it before you burn it, even there its fine, so why is it when the disk is burnt and I play it in any dvd player, all my sound is out of sync with the picture?

Its so annoying, esp after waiting 2 hours for rendering etc and then keep throwing my dvd's away afterwards.

Any suggestions?

[ricky1756]

did you convert your audio samplimg rate from 44000 to 48000?

[DVD Newbie]

No I didn't. The quality of the music file is 44.1Khz, is that why there's a problem? How do I convert it to 48khz then?

[lafamar]

Hy DVD Newbie,

To convert from 44.1khz to 48khz go to:

https://www.videohelp.com/tools.php?tool=92#comments

The software is free.
Good luck.

[PhreakPhish]

i have the same problem - but when i convert to 48 it still does the same thing -=[

[MrMungus]

Hi there

Using ULead VideoStudio 7 I have editied my project with muisc as a background and spent days getting the pictures in sync with the music. When I play the project in Ulead it is fine, when I create disk you have the option to see it before you burn it, even there its fine, so why is it when the disk is burnt and I play it in any dvd player, all my sound is out of sync with the picture?

Its so annoying, esp after waiting 2 hours for rendering etc and then keep throwing my dvd's away afterwards.

Any suggestions?

Have you tried outputting to MPEG-2 or AVI from Ulead to see if the synch is OK?

Have you tried authoring with another program such as TMPGEnc DVD Author?

If you don't want to waste a lot of disks, write the DVD to your hard drive and then play it with a software DVD player to check the synch. Windows 2000 has one built in.

[PhreakPhish]

i have a question - if you have a file synced in an avi file and encode it to an mpeg -2 will it go out of sync? i know when you convert from an mpeg that i capture and that is saved in sync and then encode it to MPEG (dvd format) it goes out of sync - so i was using virtual dub and loaded my mpeg and saved it as in avi that is IN sync - now all i need to do is convert this avi to mpeg-2 and hope its in sync - otherwise if i use the mpeg that i captured with when i burn it goes out of sync , like your problem - i belive it is encoding the audio differently so you will have to change it up a bit - maybe my way will work? or is there might be a better way out there? i also tried using soundforge to match the audio with the video but that didnt work - hopefully this helps you get a better idea of what is going on

[DVD Newbie]

Hi,

After reading your reply I'm more confused than I was when I started!!

I took out my audio file and replaced it with the same after converting it to 48Khz. I then created a DVD File and played the file from my HDD using Power DVD, it worked fine. I haven't burnt it to disk yet, so I will update you when I do and see how that gets on.

Nobody has actually said why converting the sound to 48Khz would fix it.

Does anyone know?

[teegee420]

48,000hz is the DVD standard, not 44,100hz. That's really the only reason.

[PhreakPhish]

when you encode a mpeg file that is already 48,000hz and in sync through main concept, tmpgenc dvd source creator, pinnacle studio 8 or tmpgenc it makes the mpeg go out of sync - i thought that if it was 48,000 it should stay in sync - what is going on in the encoding that is making it go out of sync? maybe there are other settings that both of us aren't doing????

[teegee420]

If I had a file that already had a 48,000hz stream I wouldn't re-encode the audio at all. Only a video only elementary stream and I would then mux it with the original audio.

One thing about Mainconcept, I now use it pretty much exclusively and I noticed early on that my encodes were coming out with bad a/v sync. I disabled the mpeg import module in the options and that fixed my problem. Not sure if it will solve yours but I thought I'd throw it out there.

[PhreakPhish]

OK - So I think I get what you are saying -

I have an MPEG FILE and my audio is 48,000hz
-Demux it to get Video & Audio
-re-encode Video only w/ Main Concept w/ mpeg module import taking off
-remux new video and old audio (from mpeg or demuxed?)for a new mpeg
And that should work for the sync problem?
thanks for you help - i'm getting a better understanding of how this works a little more - I have like 40 8mm tapes i need to convert and i dont want to be encoding files all day - there must be an easy way to this sync problem

[teegee420]

I'm getting a little cross-eyed now but I think I understand what you are doing. You are converting an mpeg that has 48,000hz audio and when you create a new mpeg, the audio is out of sync. If you want to save yourself the time of de-muxing and muxing again old audio with new video, just re-encode both together, just make sure you disable the mpeg import module. Now let me state again, this fixed MY a/v sync problems. Hopefully it will fix yours too but I can't say for certain that it will. It might be worth a shot though. Best of luck to you.

[roberts83]

I had the sync problems also. Mostly it happend that i do tv capture... the result is synced.. then i convert to svcd or vcd (i don't have dvd burner) and on the play the lipsync is wrong...

The most annoying is that the sync is fragmental.. beginning is synced.. then few minutes are out of sync then again everything is ok.

So what i did:
I extracted audio separately with VirtualDub
then in TMPGEnc i selected audio from separate source - from the uncompressed file i extracted.
Recompressing the audio file did solve the problem..

Though i got again sync problem when i frameserved avi to the tmpgenc on another occassion.....

Sinclairs

[burlyboy]

I've had this problem in the past, but solved it by saving the movie to AVI, then writing to disk from the AVI.

cheers