V4 seems to be rendering my MPEG 2 out of sync

Randy Brown wrote on 11/18/2003, 2:28 PM
I've never noticed this happening before but for some reason whether I render to MPEG 2 (video/audio combined), MPEG 2 video only and AC3 or MPEG 2 DVDA video stream and AC3 ( the latter 2 being named the same and in the same folder) my audio is about a half second behind the video after burning in DVDA or playing the MPEG 2 (video/audio combined) in Windows Media Player (although it plays fine in V4). Any thoughts?
TIA,
Randy

Comments

TheHappyFriar wrote on 11/18/2003, 3:30 PM
Are you SURE it's playing fine in Vegas? could there be a stutter somewhere in there? Also, if you render it out to DV AVI does it have a sync problem? And have you tried it in a DVD player? Sometimes the computer can stutter because of the sound card (a friends does this ALL the time).

I capture VHS/Hi8 with an analog capture card and have only had a sync problem when capturing a VHS tape recorded in EP mode.

Also, are you able to try playing the file on another computer?

I'm just trying to see if it';s you're computer or a render setting.
Randy Brown wrote on 11/18/2003, 10:12 PM
>>Are you SURE it's playing fine in Vegas?<<
positive
>> Also, if you render it out to DV AVI does it have a sync problem? <<
yes
>>And have you tried it in a DVD player?<<
yes

Thanks Happy Friar,
Randy
TheHappyFriar wrote on 11/18/2003, 11:15 PM
Ok, I take it the origional footage is in sync.

Is it a consistant out of sync? As in it's 1 second off at the start and 1s off at the end? If so, try shiftinfg the audio that much to see what will happen. To line it up better, render out a section to DV AVI (that will be out of sync) and place that on the timeline above/below the origional footage. Line them up based on their video.

Then, unlink your 2 audio/video files (so all parts move freely). Then, link the 2 audio files together (so they move in unison). Now, lineup your out of sync audio with the video. You origional audio will now be out of sync.

Mute your non-origional footage tracks and then render out to DV AVI. See if it is synce'd now.

If it is, maybe there's a render setting we can play with.
craftech wrote on 11/19/2003, 8:00 AM
The audio on the EP tape probably didn't convert properly. You could try Tmpgenc or Virtual Dub or Goldwave or Timewarp or try a constant bitrate instead of a variable one when you render.
John
Randy Brown wrote on 11/19/2003, 8:26 AM
>>Is it a consistant out of sync?<<
Yes sir, and to meet my deadline I just highlighted all audio tracks and moved them over the half second. I'm still curious as to why it would do this when rendering out several ways....oh well.

Thanks Happy Friar,
Randy

John, I'm guessing you were addressing The Happy Friar
craftech wrote on 11/19/2003, 11:17 AM
Yes I was.
In terms of your complaint, I keep seeing posts about this on the forum. In fact another one was just posted. I think it is a Vegas issue.

John
TheHappyFriar wrote on 11/19/2003, 11:26 AM
I don't capture in Vegas: I use an analog capture card with iuVCR. It has an autocalc for a/v difference. Infact, when I captured the EP VHS tape, the audio was the correct part. The video was short by a couple seconds. But it wasn't a constant off, it started in sync and drifted slowly. I just stretched the video and it works (Vegas resampling rocks!)

randy, try looking in your custom render settings. For mpeg there is a "system" tab that can autocalculate audio/video delay. Mine is set to 180 with autocalc unchecked. Maybe yours is different.

Are you capturing through a sound card or through your firewire?
Randy Brown wrote on 11/19/2003, 12:31 PM
>> I keep seeing posts about this on the forum<<
Well as long as Sony knows and is hopefully trying to fix it (and I'm not going crazy) I can live with it...Like I said, this is the first time this has ever happened to me.
>>Mine is set to 180 with autocalc unchecked. Maybe yours is different.<<<
Nope, mines the same (must be the default) but I wish I had known about this yesterday when I was trying to drag all of those tracks around by fractions of a second...but thanks Happy Friar, I'll try to remember that!
Thanks guys,
Randy