Thanks for the tip but sorry to say it did not work.
Maybe I do something wrong from the start. This is my job: I record video tapes in the computer with a capture card that gives me MPG1 files, audio & video.
Then I import those files in a Vegas project, cut the commercials, make the necessary splicings, render the audio to a new track, open that track in Sound Forge, do the editing (EQ, Normalize, etc.) then play it back once more to be sure all the edit points are ok, then I render to another MPEG1 NTSC VCD format.

All the process is ok but when the final file is rendered, I get this audio lag problem. Could it be the Time code ??? I looked at it but can't find anything wrong. AAAAAAHHHHHRRRRGGGG....!!!!

I don't know how much it contributes to time lag problems, but if you're capturing and editing with MPEG1 you're not maximising Vegas's potential.

VV3 is primarily a DV editing program, even though it will accept practically any format. With an inexpensive OHCI firewire card you are editing with a duplicate of the information your DV camera records, and converting to MPEG1 is one of many Rendering options once you're finished editing. I've never had audio synch problems with an MPEG1 made this way.

Dratme, I think you don't get it. Doesn't matter wath type of file I use, I still have the problem. I am not asking for help on bying a card, I just wish to know why a project that plays correctly in Vegas will turned into a problem of out-of-sync audio once rendered.

>>>Dratme, I think you don't get it. Doesn't matter wath type of file I use, I still have the problem. I am not asking for help on bying a card, I just wish to know why a project that plays correctly in Vegas will turned into a problem of out-of-sync audio once rendered.

does this always happen, or does it only happen with certain source files/projects?

if this is happening constantly, you should seriously consider trying different source files (non MPEG-1). MPEG-1 is not designed to be edited. that's why Dratme was suggesting DV. your quality will improve, and you will have far less trouble editing DV source than MPEG-1 source.

if it is only happening with one certain source file, you could try re-capturing it maybe with different settings.

Cheesehole,

So far I am stuck with those MPG1 files. No way I can recapture them or have new ones. They come from my client who captured them himself and now asked me to make the VCDs for him. He erased all his VHS tapes before I even met him.

Please read the 3rd thread of this topic and see the details of what I am doing. I would appreciate if you have any insight on it. It is possible I am missing some very basic things about Vegas but to my knowledge, my working process looks fine.

And please try to understand this: once those captured files are in my Vegas project, the audio and video are in PERFECT SYNC. If I play them on the Win media player, no problem there either. The problem only occurs when I listen to the rendered project.

By the way, I know I may sound a little unpatient here but please know that my client is pressing me here. I want to say that I am happy some of you take some time in trying to help me. I hope I can do the same one day.

sorry if you've answered this already, but do you get the problem when you render to an uncompressed AVI?

you could then use TMPGEnc to compress it to MPEG-1.

OR if you do get the lag with uncompressed AVI, you could try using another tool, such as Media Cleaner Pro to convert your MPG-1 source file into a DV or uncompressed AVI. you could then replace the media in Vegas with the DV version.

I think it's worth a shot if you have a client waiting.