Exchanging Audio-Stream in VOB

[Malcolm]

Hello,
does anyone know a method / program to exchange an audiostream in a VOB by another (same length)?
I'd like to transcode 5.1ch AC3 audiostreams to 2ch AC3/MP2 audiostreams during DVD backup.

For this i'd do the following:
- Rip the DVD to HD
- Demux the audiostream
- Transcode it to MP2
- Exchange / Remux it to the VOB
- Shrink the DVD to DVD-5

Thanks and greetings,
Malcolm

[Dave82]

Remember to edit the audio stream properties in IFOEdit. I'm not sure, but I think you should also do a mock strip (strip keeping all the streams) to correct sectors and so on...

[Malcolm]

bump

[burnout]

i've been looking into this and do a similar method, but i strip by vobID (if there is more than 1) and then i use vobedit to put them back together if the vob id's are long (put them into titles), or i use addchapter to add a blank vobID if that's all it was on the orig. then i use the replace feature of vobblanker to fit them back into the dvd structure (multi pgc can require the vobIDs in correct places for the titles and i'm not sure how the method works when the pgc's use duplicate vobID's, gonna look into this). i think jsoto has put vobID replace feature on the 'TODO' list of vobblanker.

i have been messing round looking for the quickest way and trying to automate the process a bit using .bat files.

any other ideas would help me too, i guess a simple vob-ID author (would require scenarist i guess) and then ifoupdate would also work fine.

edit: also wondering what method u are using to shrink to DVD-5 as it can be done during the DIF4U process

[Malcolm]

after reading your description, your method with vobedit + vobblanker looks a bit complicated to me. but maybe that's the simplest possible way with current tools. i never worked with vobedit + vobblanker, so i can't really judge about it.
I asked jdobbs in another thread (here (http://forum.doom9.org/showthread.php?s=&threadid=75513)) to integrate this into DVD-Rebuilder. (Transcoding or reencoding the audio from AC3 to MP2 via BeSweet during the DVD-Rebuilder process). So compressing the audio would have the same significance in DVD-Rebuilder as compressing the video. Calculation of the final size would automatically include the new audio-size, and the whole process would be a simple point&click for the user. (especially for me :))
The manual method to replace the audio should have been only an alternative to the convenient point&click solution in DVD-Rebuilder.
But since i'm not sure if there will happen anything soon in DVD-Rebuilder, i'm still searching...
One thing would be an advantage: If you can replace the audio with a separate program/batchscript, then you're not bound to DVD-RB. So you can use any Transcoding-tool you prefer.

Greetings,
Malcolm

[burnout]

exactly what i was trying to do, also requested this feature (downsample/replace audio) for DVD ReBuilder, then i probably would switch over to it. Would be nice to have an automated method to do this though outside of DVD ReBuilder so it could be used in many different situations.

Problem is i'm crap ap programming (can handle batch files though), but i'll keep trying on this, just isn't easy to sort for lots of streams. :rolleyes: