audio drops

rik wrote on 2/28/2014, 2:24 AM
Hi, i never needed the vegas forum, but i'm stuck now. (use vegas 12 770).
My computer is a quadcore, 4gb memory.
For many years, i use 2 videocams, and a couple of additional audiotracks.
I sync them al together.
Never had any trouble.
The project length consist of 3 hours of footage, while editing it to become about a 1.30 hour movie
Since a couple of weeks, i experience "audio-drops" while playing my footage in Vegas.
To be sure, it isn't a hardware problem (audio-device, disk,...), i saved my vegas-file and opened it in another computer, with footage on another disk, again to exclude any hardware problems.
I experience the same problems.
It's driving me mad.
Any ideas?

Comments

rraud wrote on 2/28/2014, 9:09 AM
Are you using a specific audio plug-in or chain. Some plug-ins are CPU hogs and can cause audio dropouts. The iZotope and Wave plugs are notorious. This should not affect the renders though.
jbolley wrote on 3/19/2014, 1:36 PM
I'm noticing some dropouts too. There are no plugins being used at all. Source files are MXF
When I open the project all is well. If I zoom in dropouts appear in the waveform and audio that were not there before.

Jesse Olley
Adam QA SCS wrote on 3/19/2014, 2:48 PM
Jesse,

I have not been able to repro this, please give me more information so that I can possibly repro it.

Thanks,

Adam
flyingski wrote on 3/20/2014, 2:16 AM
anok,
Any chance you are using current Canon consumer AVCHD camcorders? If so they drop 2 frames (ntsc) at every file break. It's probably not Vegas or your hardware. The lip sync becomes noticeable after about 30 minutes or 3 files. If this is the case let me know and I'll post a work-around.
jbolley wrote on 3/24/2014, 12:02 PM
Adam,
Thanks for the interest. If I can repro I will let you know. I've since ditched that project and made a new one. There is a zoom level where audio peaks become unavailable until you hit stop and they can draw again. It seems to have something to do with this zoom threshold.

jbolley
Kevin Mc wrote on 3/25/2014, 2:12 PM
Try rendering the troubled footage. If the audio drop is gone, then it is a processing problem with the stock audio track plug-ins in Vegas. If the audio drops are still there ... then ... Question: can you play back the raw video file in VLC without the audio drops? If you hear them there while playing the raw media, your camera or mic might be the problem.