Rendering as MPEG2 DVDA NTSC video stream: loss of audio sync

Cunhambebe wrote on 1/15/2004, 12:45 PM

Everytime I render a project as MPEG2, I've got this problem: loss of audio sync. Can anyone hlep me, please. If I render first as AVI and then open the file later in the timeline to render i tagain as MPEG2, I've got the same problem. Thanks in advance.

Comments

farss wrote on 1/15/2004, 1:20 PM

If I read that correctly, you start with a project, render to a new AVI, bring that AVI into a new project and it's out of sync?
If that's the case the mpeg2 part is irrelevant.

By how much do you think it is out of sync?
Do you have any precise way to check it i.e. clapperboard etc?
Assuming you're only talking less than 10 frames it'd be impossible to get an accurate estimation of sync on playback in Vegas.

You need a video event to compare to a blip on the aduio track.

If you're talking seconds out of sync that's a different matter!
Probably you've slipped an audio track in the original project, it's VERY easy to do in Vegas.

Cunhambebe wrote on 1/15/2004, 6:33 PM

Thanks for answering, farss. By the way, I've checked the AVI files out once again. There's no problem with them. And again: yes you got it correctly - I render projects as AVI and later, openning these AVI files in the timeline, I render them as MPEG2 (guess there's nothing wrong with that, isn't it????).
Anyway, I guess I've found an answer for the MPEG2 audio loss of sync. I was playing the rendered MPEG2 files with Windows Media Player (even with the MPEG2 decoder installed), so the audio was running faster than the video (is that the answer?????). As soon as I installed Power DVD, the MPEG2 files began to play correctly (with it).
I thought it was strange because before all of this began to happen, I was rendering small projects as MPEG2 and playing them with WMP, with absolutely no audio loss of sync. The problem began to happen with bigger projects (more than 8 minutes). Anyway, I guess now (if everything is OK with the procedures I describe around here), I am ready to start rendering for real (after 3 and 1/2 weeks learning and trying Vegas).

farss wrote on 1/15/2004, 7:22 PM

Sounds like you're on top of it.

Cunhambebe wrote on 1/15/2004, 8:03 PM

If u think so, farss, I do believe it. Thanks. The problem now is to fix brightness and contrast....lolll
Thanks again for your help, farss. C u around.