Mpeg rendered with Debugmode Frameserver creates sync issues on DVD

vbencev wrote on 8/10/2018, 10:46 PM

Hello!

I have problems with a frameserved file from Sony Vegas. I rendered a project from Vegas with HCEnc by the help of Debugmode Frameserver (loaded the frameserved avi to HCEnc). I rendered it as mpeg, because I want to burn it on DVD. The mpeg itself plays fine on all devices, has very good quality, plays without framedrops, etc... But, when I author a DVD from it, problems arise. The problem is: when I play the DVD from an external USB DVD drive with BSPlayer on one of my computers, the DVD audio video is in sync. But when I play the same DVD from the same external drive with BSplayer on my another computer, the DVD audio is out of sync. And this goes similarly if I try other softwares and players. On my standalone DVD player the audio is out of sync, but when I play it on a third laptop on the internal DVD drive with Windows media player, it is in sync. I am talking about the same DVD in all cases. 

It seems to me the DVD created from the mentioned file is not compatibile with some codecs on some platforms. Can you suggest a way to make it compatibile on all platforms? I have factory DVD's that play fine every way. I just don't know what is different in ther coding that makes this possible. Maybe I should set a padding for the audio, that some drives will consider, but some will skip, thus ensuring the playback will be in sync on all devices and softwares?

The same problem happens in case I render the file from Sony Vegas directly, too.

Let me emphasize again this problem arises when the rendered file is authored to a DVD. When the mpeg file is played itself, the playback is good.

 

Comments

Musicvid wrote on 8/11/2018, 8:13 AM

-- Why you are frameserving to an external encoder is beyond me.

However, that is not the cause of your problem, at least on the surface.

The problem is: when I play the DVD from an external USB DVD drive with BSPlayer on one of my computers, the DVD audio video is in sync. But when I play the same DVD from the same external drive with BSplayer on my another computer, the DVD audio is out of sync. 

There is a name for this -- "hardware latency." It is always worse on USB audio, and is made worse yet by using a DVD bitrate above 6Mbps, or CBR.

There is nothing you can do to fix your friend's computers, sorry.

Former user wrote on 8/11/2018, 8:16 AM

IF the file is in sync on any of the players, then it is not a file problem, it is a player problem. Plus your post is confusing because you talk about the external encoder and then mention that you have the same problem with a Vegas file directly, so is the encoder relevent to the problem?

john_dennis wrote on 8/11/2018, 12:01 PM

Put the video and audio from your final render back on the timeline of your Vegas project as described in this thread. Determine by testing if there is audio shift and where it happens in your workflow or player hardware/software.

vbencev wrote on 8/12/2018, 4:40 AM

The audio on the problematic DVD is about 240msec late when played back on the standalone player, on computer DVD drive it plays in sync. Interestingly, when I check the audio wave in the editor, it shows it is 20msec ahead. So totally the opposite than the symptom.