Video and Audio Out of Sync Bad

PunchNBurn wrote on 11/19/2003, 10:25 AM

I have captured to MPEG2 from Analog Video. I can play the MPEG2 files in a player and everything looks and sounds great. But, when I import this media into Vegas the sound and video are way out of sync. The preview media is out of sync and even after adding the media to the timeline its even more out of sync.

I tried doing a full render process thinking it was just a problem with the previewer only to find out 7 hours later that it really is out of sync. Aargh!

If it helps, my hardware is an ASUS P4P800 Deluxe MB with 2.6 GHz P4 800 FSB and the graphics card that I capture from is an ATI All-In-Wonder 9800 Radeon. I am using fast and large serial-ATA drives. Sound is integrated on MB. This system screams so its not slow hardware.

I am rendering to MPEG2 separate Audio/Video to DVD Architect. Rendered MPEG2 from DVD Architect is out of sync as well.

Why is the video and audio out of sync in Vegas?

Also, what project template should I use for this process (VHS to DVD conversion)? Would this make a difference?

Comments

TheHappyFriar wrote on 11/19/2003, 11:16 AM

I've captured Mpeg-2 and edited it in Vegas with an ATI AIW 7500. Sometimes it got outta sync, sometimes it didn't. It was not noticable for small thing (under 1 minute) but when I'd capture 1 hours stuff it was sometimes noticable. I belive you need to mess with your capture settings (all I frames, etc.).

Sometimes you just can't get around it the out of sync. What you can do is try stretching your audio to fit your video, or your video to fit your audio. Everytrime I've had out of synce stuff it's always been the audio has been correct the video was off. Compare your audio length to the length on your source, and video with the source.

PunchNBurn wrote on 11/19/2003, 2:35 PM

As it turns out you cannot import MPEG2 source files to Vegas. Well, you can but they are un-editable and won't re-encode properly. So if you have an ATI card and you want to capture using ATI's TV PVR function (which only outputs MPEG2), you are out of luck! You just wasted $400 on a graphics card.

So what happens if I want to pull the MPEG files off my PVR unit and convert them to another format? You can't use Vegas. You will have to use another MPEG decoder first and convert to AVI or something Vegas understands.

Whew!