Mpeg2 audi/video sync issue

roundup wrote on 7/30/2003, 12:51 AM

Alright, after reading many posts, can someone tell me if this is correct:

After editing a longer (20 min plus) avi clip and rendering into mpeg2 for DVD, i get a .2 second lag in a/v sync. What am I doing wrong?

Anyway, am I correct in that if I'm using DVD-A for those Mpeg2 files, I can render video stream only first, then render audio in AC-3 with the same file name and DVD-A will grab both when inserting media?

Maybe this is better off in the DVD-A forum, but I know this is a VV4 issue, too.

Thanks for newbie help.

Comments

mikkie wrote on 7/30/2003, 8:30 AM

"After editing a longer (20 min plus) avi clip and rendering into mpeg2 for DVD, i get a .2 second lag in a/v sync. What am I doing wrong? "

Shouldn't have a lag, but if it's constant throughout you can set the flag in the mpg2 for it, to delay the audio - think the default in VV4c is 180 ms for both video and audio when they're rendered together as mpg2.

Usually see complaints of audio sync drift that can usually be attributed to the source (breaking it up into smaller clips on the timeline is kind of universal advise that's been around for years regardless the NLE whenever this happens). Also have seen drift prob when captured video and audio clip lenth didn't match - something easiest cured in Vegas by correcting the audio length.

"Anyway, am I correct in that if I'm using DVD-A for those Mpeg2 files, I can render video stream only first, then render audio in AC-3 with the same file name and DVD-A will grab both when inserting media?"

yes

roundup wrote on 7/30/2003, 9:52 AM

Thanks!