Audio out of sync

Johnwt wrote on 2/26/2005, 1:57 PM
I just built a new computer and added an ATI AIW Radeon 9800 Pro to convert some family tapes to digital. To test it I saved two episodes of "Friends" off a cable TV hookup, one in MPEG-2 and one in DV-AVI. No dropped frames. Both play fine in Media Player and both play fine and edit in VideoStudio, Windows Movie Maker, and NeroVision Express 3. When I add the file to the timeline in Movie Studio (Vegas 4.0) it takes some time while building peaks and then the audio is quite out of sync, more toward the end then the beginning of these 1/2 hour clips. In media explorer it also gives a different length for the audio and video portions of the files. Using an audio Fx to set the audio to the same length as the video doesn't help. Rendering to a file completes without error but produces a file with the audio out of sync. Since the files play and edit in ever other program I can try them on, it surely seems like something in Movie Studio but I can't figure out what. I have some other AVI files that seem not to have the problem. Since I like MS best, I would like to use it as my prime editor. Any ideas? Thanks

Comments

ScottW wrote on 2/26/2005, 7:19 PM
Which file has the audio out of sync, the mpeg-2 file or the DV avi file? I'ts pretty common for these low end capture cards to produce poor quality MPEG streams that editing software can't handle. Whenever possible you should alwasy capture to DV AVI - it's larger but there are far fewer problems using it (MPEG-2 is a delivery format, not an editing format).
Johnwt wrote on 2/26/2005, 7:29 PM
Both are out of sync, and all other programs I mentioned play both files without an error, video and audio are in sync. They are only out of sync in MS. I have even edited both files in VideoStudio taking out commercials, and burned the edited files to a DVD which plays in sync in two different DVD players. My favorite editor, MS, seems to be the only problem.
grovesey wrote on 3/2/2005, 3:02 PM
From conversations elsewhere on this forum, I think it may be that you're somehow rendering your material twice in mpeg.

Apparently double mpeg coding will cause a lag on sound (and a deterioration of picture quality). i'm no expert, but perhaps you should check your material isn't being encode into mpeg twice.

grovesey.
merehuman wrote on 6/14/2005, 10:10 AM
Hi John,

Did you ever resolve this issue. I too am experiencing the audio sync issue on captures I made with my analog capture card. I actually capture using a different app since MS won't save my captures (see other post by me related to analog capture problem).

I capture in mpeg2 and edit with MS. When the video is raw it seems to be sync'd ok, but maybe not I never really checked toward the end before I started editing, I just noticed after I edit out commercials the audio starts to shift and gets really bad by the end of the stream. Maybe it was bad all along. I'm going to try to confirm that.

Let me know if you figure it out. I also like MS as an editor, but if I can'r resolve these annoyances I may be forced to find another app.

Thanks,

Larry
ScottW wrote on 6/14/2005, 12:15 PM
MPEG-2 is a delivery format, not an editing format. If you're going to spend money anyway, you'd be far better off investing in a decent analog to digital converter card that will capture to DV rather than MPEG-2. I've used the Canopus ADVC1394 and the ADVC300 and never had an issue with audio/video sync.

--Scott