remixing vob audio

[Ragsy]

Hi, Ragsy here, just joined this forum and this is my first post.
I am a musician in a rockabilly band and recently some kind people gave us a dvd of footage taken of a performance at a music festival, the sound on the dvd is average and I have played around with the audio and can get a pretty decent result after eq ing and such, but sync problems arise when I try to reinsert the audio.
The files are vob files and I would like to be able to eq these files without extracting audio and converting as I don't want to lose any quality and also there are 3 vob files on the disc that run consecutively .
Are there any dvd/vob file editors around that will let you eq and remix dvd audio?

Cheers
Ragsy

[manono]

Are there any dvd/vob file editors around that will let you eq and remix dvd audio?

No, not without demuxing the audio and editing it in a WAV editor.

...but sync problems arise when I try to reinsert the audio.

Except for a possible constant delay (easily fixed), there shouldn't be any synch problems. Check to see if the final audio is exactly the same length as the source audio. Also, you haven't said what programs you're using for these procedures and I'm pretty sure you're going about this all wrong.

also there are 3 vob files on the disc that run consecutively .

Makes no difference and your synch problems probably resulted from working on the audio 3 separate times before adding it back to the DVD (if that's what you did).

You should extract the video and audio as one big piece the length of the whole video. There are a number of programs that can do that. DGIndex and PGCDemux come to mind. DGIndex can even decode the AC3 audio (if that's what it is) to WAV audio while extracting both the audio and the video.

[Ragsy]

Ok thanks for that Manono, I was converting the whole movie to an avi in movie maker then using Adobe media converter to convert the avi to mp3 to get the audio the eq and such in Audition ....so yes I can see that I've been going about it the long way.
I'll follow you advice and see what happens.
Cheers

[MilesAhead]

Also there's a wicked simplified way of doing it that still works today. No need to rtfm.

Use VOB2MPG to get .mpg files from the vob title sets.

Then you can use the free version of the old
TMPGEnc for mux/demux.

In the File menu is MPG Tools. There's a simple muxer/demuxer in there. It's close to impossible to make a mistake. Even though the free TMPGEnc did not have AC3 support for encoding, the MPG Tools mux and demux it without complaining.

[manono]

I was converting the whole movie to an avi in movie maker then using Adobe media converter to convert the avi to mp3 to get the audio the eq and such in Audition

In your first post you said you didn't want to lose quality. So here you're converting to AVI (huge loss of quality), and also to MP3 (an even greater loss of quality), before doing the audio work and reencoding back for DVD (more loss of quality)?

The video doesn't need to be touched except for being demuxed. It'll remain exactly the same as originally. It's the audio that needs to be demuxed and converted to WAV audio before going to work on it and then reencoding back to AC3. If your work actually improves the audio, then even though it's been reencoded once it should be better than the original.

When the time comes to put the pieces back together again, post again for instructions on how to do that. You can reauthor it and get back the original menus, if that's what you want. Or maybe you are more experienced on the authoring side and won't need any help.

[Ragsy]

Still no luck, I downloaded and installed pgcdemux, then demuxed the audio and video, then converted the ac3 to .wav in Adobe media converter then equed and mastered the wav file in Adobe Audition, then loaded the demuxed video file and the equed wav file into movie maker and still the same problem.....the sound starts off in sync but by the end of the clip is way out of sync, it appears that after demuxing the video file seems to be of less duration.

[Ragsy]

still reading other threads here...could my problem be because I have just copied the dvd files to my machine and not ripped them?

[hech54]

Stop messing with individual VOB files. Use something like VOB2MPEG to get to MPEG video with AC3 audio.
Drag that MPEG file into GoldWave to have it decompress the audio to WAV.
Either do your enhancements in GoldWave or save the audio to an external WAV file to do your enhancements.
NO EDITS....just enhancements. Edits will of course mess up the sync.