Audio/Video Out of Sync in VV3

teamitazura22 wrote on 1/28/2003, 1:19 PM
I'm a newbie to this and hope you all can help me out here. I have a LeadTek WinFast TV XP 2000 capture card. I used this to capture a tv show onto my hard drive in MPEG-2 format. When I viewed it, the audio and video was in sync. Then, I used Vegas Video 3.0 to edit out the commercials and render it back to MPEG-2 and the audio and video was out of sync. The audio was ahead of the video. It starts out fine and gets gradually worse. I'm about ready to pull my hair out over this and would greatly appreciate any help you guys can offer me. Thanks.

Here are my specs:
P4 1.8A Processor
768 DDR PC2100 RAM
70GB 7200 Hard Drive
GeForce3 Video Card
Sound Blaster Sound Card

Comments

mikkie wrote on 1/28/2003, 1:29 PM
Mpeg2 saves two streams, audio & video, more or less independantly rather then interleaved like avi. The actual timing of the 2 is different, so drift is a problem. Capturing in avi might be one option. Otherwise, I've heard of people in this situation making a lot of cuts, to kind of force the software to recognize that at these points the audio & video should be together.

A third, perhaps more tedious method, is to note the exact times where you would cut out the commercials. Then use a cut/join mpeg2 program (digital-digest.com) to remove the parts you don't want, and join everything else back together. The advantage would be no re-rendering of the mpeg2 - the downside is that your cuts would be limited to the nearest keyframe, not exactly where you wanted.

FWIW: if you can capture to mpeg2 using all I frames, & assuming you get the audio sync solved, you might get better edits & renders.

mike
teamitazura22 wrote on 1/28/2003, 1:40 PM
You are correct in the AVI solution. Recently, I thought the format might be a problem so I captured the show again in AVI and edited it and rendered it back to AVI and it came out perfect. The only drawback was that the quality was not that great. I'm planning on burning these to DVD and would like to keep it at the best possible quality as I can.

Your advice on the cut/join program might be useful and may be the easiest option. I will have to look into that. Are there any other advices on how to resolve this issue?

I love VV3 because its very precise in frames and makes it very easy for me to cut out commercials. Are there other softwares out there that is as precise as VV3 but does not have this problem?
Emeraldoracle wrote on 3/24/2003, 2:51 PM
I've been doing the same thing (recording shows and editing out the comercials with the winfast tv2000. I've had the same problem with the audio sync with mpeg2. I ended up just using mpeg1 to solve the problem.

The thing I noticed is that in vv3 that when playing the mpeg2 file once in awhile the video skips causing the audio to get out of since. Happens around 6-15min and then periodically causing the sync to get worse and worse. And the location that the skipp occurs is consistant.

If you play the original footage outside of vv3 then it doesn't skip.