Vegas Pro 15 Edit - audio desync in video files

claire-rousseau wrote on 4/20/2018, 9:45 AM

I'm getting audio syncing issues when opening a large MP4 file in Vegas Pro 15 Edit (build 321). The early portion of the video (the first hour or so) is fine, but near the end I get a consistent desync of a few seconds - it's very, very noticeable.

I work for a small video production company, my boss also uses Vegas Pro 15 Edit (but he's running build 261) and the exact same file opens up perfectly fine on his version of the software, with no desync at all, so we know it's not just the base file that is messed up. We've tried opening other similar files on my computer, and they are also running fine. Before I upgraded to 15, we had some issues moving files from Vegas 14 to Vegas 15, where the file we moved would become desynced in 15. We figured upgrading to the same edition of the software on both machines would fix the issue, but that's clearly not the case.

So we can't reproduce the issue consistently but it does happen regularly enough that it really is a problem for us.

Does anyone know what causes audio desync in Vegas 15? Do we need to be running the same exact build? Mine is more recent (build 321) but my boss's (build 261) is the one that is working fine - can I roll back to a previous build? Could this have anything to do with our respective computer specs?

Thanks!
Claire

Comments

john_dennis wrote on 4/20/2018, 10:27 AM

Is there a visible difference between the length of the audio and the video when you zoom in on the timeline?

john_dennis wrote on 4/20/2018, 10:36 AM

Download earlier versions here from #5.

claire-rousseau wrote on 4/20/2018, 12:12 PM

I can see a visible difference between the audio and video in the timeline, but when I adjust the audio to match the video (using ctrl to stretch), it doesn't actually fix the syncing issue. It's the weirdest bug. I'm going to download the earlier version that my boss has so I can run some tests on that - thanks for the link.

john_dennis wrote on 4/20/2018, 1:22 PM

Please provide information from C in this link. Of particular interest are the Mediainfo report for your source file(s) and the Vegas plugin used to decode the file from both the machines. 

WaifuWeeber wrote on 4/22/2018, 4:27 PM

I have the same exact problem its indeed the weirdest bug I have ever come across in Vegas 15. When I play my video outside of Vegas 15 the audio is perfectly synced. This issue has surfaced ever since the last build. But in Vegas 14 the audio is perfect as well

UPDATE: Build 216 for V15 fixed the audio desync. Something definitely buggy within the latest 2 builds my audio format is pretty basic nothing vegas shouldn't have trouble with. AAC, 48,000 Hz/stereo

walter-i. wrote on 4/22/2018, 4:33 PM

Please provide information from C in this link. Of particular interest are the Mediainfo report for your source file(s) and the Vegas plugin used to decode the file from both the machines. 

.... as john_dennis already asked.......

WaifuWeeber wrote on 4/22/2018, 5:22 PM

No need for that we are telling you the latest 321 build has audio desync issues which actually carried over from build 261. If multiple users are having the same issue I believe you guys should actually investigate on what going on instead of giving generic replies. Anyway going back to a previous build fixed the problem

claire-rousseau wrote on 4/22/2018, 6:31 PM

Just to confirm, going back to build 261 solved the problem completely. Thanks for all your help!

OldSmoke wrote on 4/22/2018, 7:06 PM

No need for that we are telling you the latest 321 build has audio desync issues which actually carried over from build 261. If multiple users are having the same issue I believe you guys should actually investigate on what going on instead of giving generic replies. Anyway going back to a previous build fixed the problem

It would be very difficult for the developers to fix what you are asking for without providing any information about the type of video file that caused the problem.

Proud owner of Sony Vegas Pro 7, 8, 9, 10, 11, 12 & 13 and now Magix VP15&16.

System Spec.:
Motherboard: ASUS X299 Prime-A

Ram: G.Skill 4x8GB DDR4 2666 XMP

CPU: i7-9800x @ 4.6GHz (custom water cooling system)
GPU: 1x AMD Vega Pro Frontier Edition (water cooled)
Hard drives: System Samsung 970Pro NVME, AV-Projects 1TB (4x Intel P7600 512GB VROC), 4x 2.5" Hotswap bays, 1x 3.5" Hotswap Bay, 1x LG BluRay Burner

PSU: Corsair 1200W
Monitor: 2x Dell Ultrasharp U2713HM (2560x1440)

NickHope wrote on 4/23/2018, 1:42 AM

No need for that we are telling you the latest 321 build has audio desync issues which actually carried over from build 261. If multiple users are having the same issue I believe you guys should actually investigate on what going on instead of giving generic replies. Anyway going back to a previous build fixed the problem

This is like telling a doctor that you have food poisoning, but then refusing to tell him what you've eaten.

If there is an issue with audio sync in VP15 build 261/311/321 it will simply not get fixed unless those who suffer it provide details or samples of the formats they are using.

rom-r wrote on 5/30/2018, 7:38 AM

Hello, I'm also having this problem when trying to edit my twitch VODs

I have Vegas Movie Studio 15.0 (Steam Edition) Build 106, and the file that i want to edit is in .mp4 format

I used other video editing software before (such as CyberLink PowerDirector and Windows Movie Maker) and never had this issue.

joseph-w wrote on 5/30/2018, 9:18 AM

I had talked about an issue similar (or perhaps this exact issue) here: https://www.vegascreativesoftware.info/us/forum/audio-out-of-synch--111108/#ca686806

 

My solution is to remove the "mcaacplug" folder from the Vegas installation's FileIO Plug-Ins folder. If you do that you should find that rendered videos will no longer show "Variable bit rate" but instead "Constant" if you open them in MediaInfo or similar. No more dropped frames / Sync will stay consistent.
 

rom-r wrote on 5/30/2018, 10:54 AM

I had talked about an issue similar (or perhaps this exact issue) here: https://www.vegascreativesoftware.info/us/forum/audio-out-of-synch--111108/#ca686806

 

My solution is to remove the "mcaacplug" folder from the Vegas installation's FileIO Plug-Ins folder. If you do that you should find that rendered videos will no longer show "Variable bit rate" but instead "Constant" if you open them in MediaInfo or similar. No more dropped frames / Sync will stay consistent.
 

Hi Joseph, thanks for the reply. Deleting FileIO Plug-Ins folder didn't work for me, but somehow I found this solution from your link (https://www.vegascreativesoftware.info/us/forum/vp-v15-audio-messed-up--108339/#ca667273) and it's working ! 😄