Audio sync problems with mpeg extracted from PVR

grof

New member
I am having audio sync problems while trying to author simple DVDs to archive my favorite shows that I extract from my Bell ExpressVu PVR (same as Dish Networks PVR). Here's the process I have been following:

1. Multiplex the m2v and ac3 elementary streams I get from the PVR into a single program stream using TMPGEnc. Resulting mpeg file has audio in sync.

2. Edit commercials out using VideoRedo. Resulting mpeg file has audio in sync. (Thanks DRDfor the good support on this one!)

3. Use DVD-Lab to author a DVD with a simple menu listing the episodes on the DVD.

The problem is that DVD-Lab demultiplexes the program streams and remultiplexes them into VOBs, introducing noticeable delays in the audio. Actually, the audio gets more and more out of sync as the particular episode plays. It's not just an offset.

I read on the DVD-Lab message board that this may be due to dropped frames in the stream coming from the satellite. The program stream would play fine because of the Presentation Time Stamps (PTS) but once demultiplexed, that information gets lost and that would explain why the authoring process introduces this problem.

However, I have authored a DVD using TMPGEnc DVD Author using the same mpeg files and got no delays. The problem with DVD Author is that it's not as quick and efficient as VideoRedo to cut commercials out and the authoring is very "contained", i.e. you don't have much freedom in creating your menus.

So my preferred solution would be VideoRedo with the right authoring software. Does anyone have an idea of what i could try with DVD-Lab or another software?

I am now down to thinking that I could author simple DVDs into TMPGEnc DVD Author, only to get the correctly-synced VOBs created and then bring them into DVD-Lab, hoping that it will take them as is without demuxing them, but that seems like a lot of extra steps, which I would rather avoid.
 

Danr

Administrator
Staff member
Two things to check:

1) You are using the Alternative multiplexer in DVDLab.

2) Did you disable the MovieFactory compatability checkbox in VideoReDo (Tools>Options>General parameters)

Any other DVDLab users out there?
 

gplasky

New member
I use VideoRedo to cut the commercials. VideoRedo opens all my recorded mpeg files from Sage TV with no issues. Then, if I'm doing menus I use TMPEnc DVD Author for the DVD. I have no issues with video-audio sync. Depending on what quality I'm recording TMPEnc DVD Author will sometimes have issues with the mpeg's I record. It will open them but error out on the audio portion. That's why I use VideoRedo to do the initial cutting. After I use VideoRedo, TMPEnc DVD Author has no issues using the mpeg file.

Gerry
 

Anonymous

New member
what does VideoReDo do to the sage files that makes them readable by TMPGencDVDAuthor?

I have a problem where about 1/2 of my sage program files (DVD compliant @ 1.8 gb/hr quality) are not usable by TMPGencDVDAuthor and I don't know why.
 

Danr

Administrator
Staff member
have a problem where about 1/2 of my sage program files (DVD compliant @ 1.8 gb/hr quality) are not usable by TMPGencDVDAuthor and I don't know why.
Two questions:
  • What kinds of problems are you seeing with TmpGEnc DVDAuthor?
    What capture card are you using?
 

gplasky

New member
Using PVR250 with Sage to capture TV shows. The problems I have dealt with have mainly been audio. I'll open a Sage recorded mpeg file with TMPGEnc DVD author and go into edit the video. If I click play I'll get a dialog box about the audio. Then audio will not play from that file. I can edit and finish doing anything I want to it but I'll end up with a DVD with no audio. Using VideoRedo it will open, I'll edit, never having any audio issues and save it out. When I open it with T-DVD Author everything is now fine. No audio issues and then I can add a menu or create and burn to DVD. No problems. I've recorded in various quality-standard, better, best, DVD-Long play, DVD Standard play. And actually the qualities that don't have the DVD-whatever quality I have the least issues with. Maybe it's doing vbr-not sure. I know with the DVD settings it's doing 384 kb for audio bitrate. I think most standard DVD's do 224.

Gerry
 
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