Not sure if this an audio issue or a conversion issue

[yuffy]

I'm capturing & editing DV via Videostudio7. I also add a music track as they are home movies of the family.
I then frameserve to TMPGenc via Videotools plugin.
Then I encode to MPEG2 using ES for video & Audio. I can't find any other way of extracting the audio using the plugin. I've tried V/Dub to extract the audio but V/Dub list the audio file as unknown. If i then try Besweet to convert the audio to ac3 I get error 58. Maybe I'm missing something but the only way I can an audio file is by using TMPGenc.
Anyway after creating the two files I then use AVI2MPEG2 to multiplex the two files.
At that point I load them into DVDworkshop for authoring. It is there that I notice a gradual sync loss between the video & audio.
Trust me I have read about 200 post's about audio video synch but most of them seem to relate to other formats.
I have checked the settings in videostudio 48Hz 16 bit the music track & the project settings , ditto TMPGenc.
I have not noticed this before I started to use the frameserver.
Any ideas. Or if this should be posted to Audio please advise.

[bugster]

Then I encode to MPEG2 using ES for video & Audio.
Anyway after creating the two files I then use AVI2MPEG2 to multiplex the two files.

I don't really understand why you are doing this as TmpGenc can create a single combined stream when you encode. I suggest you try this, or use TmpGenc's mpeg tools to multiplex ths streams and see if that works.

[yuffy]

Well as a complete novice I use the guides & search the forums & follow the info.
Two guides I have used are these.
https://www.videohelp.com/forum/userguides/179038.php
http://dvd-hq.info/Compression.html
I've also seen on a number of posts to use ES for DVD & System for VCD or SVCD.
Not that I would know either way I just follow the advice.
My point was/is that untill i started to use the plugin I did not get this problem. I was also wondering if adding the music track was causing an issue.
However I will try your suggestions. What confuses me is why other guides advise ES, what is the diffreence between ES & System?

[bugster]

Some Authoring programs only accept Elementary Streams. Other only Accept System Streams, other accept either, so it depends what authoring program you are using. Also, system streams from TmpGenc always use mp2 audio so if you want PCM or AC3 in your finsihed product it has to be encoded seperatley.

[yuffy]

Well that cleared that up. I have been converting to AC3, If I'm right though, living in PAL land I will get away with using MP2. I was converting to AC3 as I believed that I would get a better sound quality than with MP2.
Just to recap. There is no quality issues concerning system, only authoring. The reason for using AC3 over MP2 is compatability with DVD players.
I never thanked you for your last time you helped with the chapters in DVDworkshop, so I'll take this occasion to say cheers M8.

[yuffy]

Well that didn't work. Audio is still out of sync.
Any ideas, anyone?

[bugster]

Instead of frameserving, can you have videostudio render out to an Avi. Try it with a 10 minute clip (should be long enough to spot audio sync drift). If the avi stays in sync, encode it with TmpGenc and see if the mpeg stays in sync. This should help us to narrow down where the error occurs.

[yuffy]

Ok I will try this.

[yuffy]

but the sync issue occurs after about 30 mins. It's a home movie & the only time I catch this is after 30 mins+. Having said that I can't catch it earlier due to the fact that there isn't an Opportunity to do so.

[bugster]

but the sync issue occurs after about 30 mins. It's a home movie & the only time I catch this is after 30 mins+. Having said that I can't catch it earlier due to the fact that there isn't an Opportunity to do so.

Hmmm, that really makes me think the issue may be with Videostudio, the source material or something you are trying to do interms of editing etc.

[yuffy]

I pray that you are still watching this thread.
In video studio there is no sync problems. The only thing that I do in video studio is capture & edit. When I say edit I mean chopping. I apply no tranistions or effects, just cut what I don't want.
I match perfectly the project template. The only thing I find in videostudio that is slightly wierd is that when I set the project settings to frame type to field order order B, prior to saving the file via the plugin it changes it to field order A. Now from reading the posts,unless I missunderstand, some programmes read filed order differently. I.E. TMPGenc & Ulead. Whatever I get no video degradation.
Believe me, I have been very carefull to match the settings.
Ok I will check the source & the edited material again.

[bugster]

Yes I am still watching the thread.

Have you actually tried outputting an Avi from Videostudio?

[yuffy]

Ok sorry about the delay in getting back.
I have defragged the disk & checked the disk for any errors. All came up fine.
What I have now firmly identified is that it is the capture process where problem originates from.
My capture settings are as follows:
Frame rate is 25.
Frame type is field order A.
Frame size is 720x576.
Data type is 24bit RGB.
Compression is Main Concept DV codec 2.4.4 type 2.
Audio format is PCM.
Audio attributes is 48000 khz 16 bit stereo.
DV type is type 2.
I use a programme called enditall to ensure that no other programmes are running in the background & I do not use the PC for anything else whilst capturing.

[bugster]

You are capturing DV via firewire right? In that case why not try capturing useing windows MM or DVIO (both free) and see if that solves the problem.

I know its an extra step but sometimes we just have to bite the bullet in cases like this.

[yuffy]

Yes, that is correct, I am capturing via firewire.
It might be an extra step but you have saved me loads of steps from that which I was doing previously.
Anyway I will give it a go & see if it solves it.
I’ll get back to you tomorrow

[yuffy]

One other thing, I'm not sure if it is relevant but I originally recorded on JVC GRDV1. I've replaced the JVC for a sony DCR PC120E, which I use to connect via firewire to the PC for capture. Connecting to the PC via firewire was not option with the old JVC & I have given it away to a relative.
I don't know if that is relevant but just thought I'd let you know.

[yuffy]

well, tried dvio, still have the same problem.

[bugster]

but the sync issue occurs after about 30 mins. It's a home movie & the only time I catch this is after 30 mins+.

So why not capture in to small ( less than 30 mins) segmets, the use Video STudio to edit and join together. Hopefully that should fix it.