Error in extracting audio from .VOB

[Deacon Blues]

Hi,

I'm, hoping to use VirtualDubmpg2 to frameserve to my NLE video editor.

I was able to open my .VOB in VirtualDubmpg2 but the audio wouldn't play on preview. Anyhow, I frameserved the file to my NLE and that went fine!! Now I have to extract the audio as wave.

Here's where the problem begins:

When I extract the audio track manually by using the File>Save WAV... command, I get errors with something called livelock. It says it ca't find the audio or something. Well, it still creates a file but it won't be read by my NLE.

The .VOBs are backed-up(created) with DVDShrink by the way! Is that OK?

what am I doing wrong? Is there any other way to extract audio?

help,

[Matthew]

Originally posted by Deacon Blues
Is there any other way to extract audio?

DVD2AVI, VobEdit are too good apps.

[rfmmars]

Live lock is not unusual when using slow filters, and I always use the ESC key to get out of it instead of cancel. The files are OK by this method.

You should not have any filter chain going when you make the .WAV file, and I don't add the filters in until you are done editing in MEP2004 because it slow things down. Also don't trim in VD. only in the NLE.

DVD Shrink is what I use too.

richard
www.photorecall.net

[Deacon Blues]

thanks,

Hey rfmmars, nice to see someone familiar around!

Filters?

I don't think I was using any. I just selected extract .wav. I don't remember selecting any filters. hmm...
As I'm not on my home computer, I'll check that up when I get back.

As for livelock, I don't see why or when I should have pressed escape.

It started to process the audio or something and then a error message appreared stating and error with livelock. I just press ok. They process stops and dissapears!

I see the audio file in MEP but when importing, MEP can't read it.

I'll try again and get back!

-
thanks Matthew, I might have to check into them if VD fails!
-


P.S. I selected "email notifications" when posting but haven't recieved any. I just dropped in and found I had replies! Hmm...

[Deacon Blues]

Ok, I've tried again with some .VOBs created with DVDDecrypter and I still get the same error when trying to playback in VD:

No audio decompressor could found to decompress the source audio format

[Deacon Blues]

Ok, I've tried again with some .VOBs created with DVDDecrypter and I still get the same error when trying to playback in VD:

No audio decompressor could found to decompress the source audio format

I suppose that is where my problem lies. Where can I find the decompressor?

---

So, dropping VD for a while, I went and downloaded VOBEdit.
Now theres a program to get my head spinning! How and where do I extract audio, or anything for that matter. And why does any link for help lead to IFOEdit. Are they the same?

ahhh, this i so confusing. And all I wanted to do was be able to get only what I wanted off the DVD and burn with my own menus. Seemed easy! But NOT!

And I'm so close too! I got the video to framserve to the editor. I just need the audio!!!!

by the way, what does demux mean?

[stephanV]

get ac3acm from fcchandler if the audio is ac3... here (http://fcchandler.home.comcast.net/)

also note that VirtualDubMod/VirtualDub-MPEG2 dont do a very good job in decoding certain VOBs/MPEG2-files ---> discussion (http://virtualdub.everwicked.com/index.php?act=ST&f=12&t=5124&)

DVD2AVI + avisynth is a better way to frameserve.

demuxing is the extracting of a stream (e.g. audio) from a file.

[Deacon Blues]

get ac3acm from fcchandler if the audio is ac3... here

How do I find out if it is?

Thanks

[stephanV]

go to the file info (in the file menu)

if it says tag 2000 its AC3... but its gotta be, because mp2 would be decoded natively.

[Deacon Blues]

Hooray!!! Thanks alot stephanV !! It plays the audio!

You can now call yourself an intellectual
;)


Oh, wait, hold the celebration, it's out of sync!

AHHHH! Now what, or is it considered ok on playback/preview in VD?

----

and I suppose thats what that thread stephanV gave was all about.

hmm... I suppose I've got to try DVD2AVI eh? Man, the amount of stuff you gotta go through and download, and learn and waste time and find, you gotta try something else! Ah, thats life!

---

now that I have checked out the linked thread, my head reels!!

Its so bloody confusing, creating a file in DVD2AVI and then scripting(I don't have time for all this) with Avisynth and what not. I found a tutorial for creating and demuxing audio in DVD2AVI. All so bloody complicated.

I sure hope someone has a swell idea quick!!!!

[Deacon Blues]

well, I tried VD with DVDShrink VOBs and DVDDecrypter files. Still no luck.

Out of sync,

I can't see how you do it rfmmars,

In your PM to me, you stated:

I rip a commercial DVD with DVD-Shrink, that creates several .VOBs, I can import any of them into VDmod or VDmpeg2 and have audio with each one after I have demux the audio to wave.

Now what do you mean by "after I have demux the audio to wave". Can you list the steps you take when importing and exporting/saving/serving? I'd appreaciate it cause I get audio for the VOB when I import, just out of sync. If I save it(is that what you mean by demux?) and use it by selecting the saved wav from the audio menu, its still out of sync.

And:

I can import any of them into VDmod or VDmpeg2

maybe I should try another version? I use VDmpeg2.

Download VirtualdubMPEG2

Thats what I use.

If your DVD isn't a commercial one,

It is commercial,

Make sure you haven't made some change in the audio menu.

What kind of changes could I have?

thanks for your help!

[Deacon Blues]

by the way, where do you get the pluging mentioned in the thread stephanV linked?

Nero suggests a workabout with the fllowing code:

LoadPlugin("mpeg2dec3.dll")

I've decided to try teh work about and I've got as far as importing the avs file into VD but it wont recognize the plugin.

or is there another plugin to use.

also, in that thread, fccHandler mentions Mpeg2Dec3 as part of the workabout yet Nero doesn't. Wher does that come in?

Thanks!

[rfmmars]

Demux means you save the .AVI or .MPG clips audio as a .wav file.

One thing I don't understand is why are you using Avisynth, it's not needed.

Step 1. open VDmpeg2

Step 2. Open .VOB or rename to .MPG and open

Step 3. From file menu choose save as .wav.

Step 4. From the file menu choose start frame server

Step 5. Click ok, then give file name with this double dot extension
......(myclip.vdr.avi, and save in your project folder.

Step 6. Open Mep2004/2005

Step 7. In Mep2004/2005 you will see only (myfile.vdr, there will be no .AVI displyed. Size will be around 44 bytes.

Step 8. Now bring in the .WAV file....align both left edges at the zero timeline or any common cursor postion.

Step 9. Play clip to see if there is any small linear audio offset, if small amount, set audio offset for between -2 to -5 points.

Do the same for all needed .VOBs........don't use any charactors such as -,_ example (myfile-2)

It works for me everytime.

richard
photorecall.net

[Deacon Blues]

thats exactly what I do richard,

what version do you use? mine's VirtualDubMPEG2 1.5.10,

Do you get sync when you preview in VD?

One thing I don't understand is why are you using Avisynth, it's not needed.

I was trying(still am) a workabout suggested by Nero in VD forums!


Play clip to see if there is any small linear audio offset,

I don't think mine's small. Anyway, I wouldn't know if the out of sync would increase towards the end or not. I can't tell.


(By the way richard, I PM-ed you)

[rfmmars]

I am using version 1.54

richard

[Deacon Blues]

where do you get that version. That might fix it. But I can't find it.

Can you email it to me or PM or something?


thanks

[fccHandler]

I can tell you for certain, that version won't fix your sync problem.

Richard's VOBs are either straightforward interlaced NTSC/PAL, or else they are FILM sources with a rigid 3:2 pattern. But your VOBs are likely a hybrid mix of NTSC and FILM, in which the rff/tff flags are erratic. To process this type of source correctly, you must use DVD2AVI + Mpeg2Dec3 + Avisynth.

[rfmmars]

Richard's VOBs are either straightforward interlaced NTSC/PAL, or else they are FILM sources with a rigid 3:2 pattern. But your VOBs are likely a hybrid mix of NTSC and FILM, in which the rff/tff flags are erratic.

It may be true that the .VOBs that I have used were this type, he's the expert on this matter. I know that all the .Vobs that I did import into MEP2004 had non-linera audio offset or would not be displayed, but were ok when frame served to MEP2004. For sure there's nothing for sure in N.L.E.

richard