reencode audio but backup full dvd anyway - how ?

[Psythorn]

Hy there...

First thing I have to say is - my life got much easier when instantcopy 8 got avaiable. But I did backups of dvds before using many many tools - and time - and hating it :-) ...

I'm looking for a way to preserve the foreign language track but reencode it to s.th. that doesn't violate dvd-standard (mp3?) in stereo with AC3-6 channel to dolby pro logic II. I want it to play on a stand alone player and instant copy has to work on it, too...

I found toppics and faq's here scratching one thing or the other - but what I'm looking for is a way to preprocess the vob files and then use instant copy on it to do all the rest. And that all kept stupid and simple - well at least as simple as possible ;-) .

Would appreciate if someone could point me at the right FAQs, Programms or howtos..

[Malcolm]

Hi Psythorn,
mp3 *does* violate the DVD standard. You can only use LPCM, MP2, AC3 and DTS.
But frankly i don't understand why you want to do this. Can you explain again please?

However: Here's a guide i have written to compress audiostreams while backing up a DVD: UPDATED: Compressing Audio before Shrinking a DVD (LPCM/ac3 5.1ch -> mp2/ac3 2ch) (http://forum.doom9.org/showthread.php?s=&threadid=84887)
The goal is to preserve (additional) audiostreams while saving (more) space for the videostreams. i.e. reencoding from 5.1ch to 2ch or going from LPCM (which takes A LOT of space) to mp2 or ac3.

Greetings,
Malcolm

[Psythorn]

Originally posted by Malcolm
Hi Psythorn,
mp3 *does* violate the DVD standard. You can only use LPCM, MP2, AC3 and DTS.
But frankly i don't understand why you want to do this. Can you explain again please?

However: Here's a guide i have written to compress audiostreams while backing up a DVD: UPDATED: Compressing Audio before Shrinking a DVD (LPCM/ac3 5.1ch -> mp2/ac3 2ch) (http://forum.doom9.org/showthread.php?s=&threadid=84887)
The goal is to preserve (additional) audiostreams while saving (more) space for the videostreams. i.e. reencoding from 5.1ch to 2ch or going from LPCM (which takes A LOT of space) to mp2 or ac3.

Greetings,
Malcolm

Why I want to do this ? You gave the answer too...
"The goal is to preserve (additional) audiostreams while saving (more) space for the videostreams."

So thanks for the link... I will look into it... And Mp3 was only an idea (marked with ?) because i was not sure it would violate standard.
Always thought mp3 is "mpeg2 audio layer 3" and should therefore be fine...

[Psythorn]

Originally posted by Malcolm
[...]
However: Here's a guide i have written to compress audiostreams while backing up a DVD: UPDATED: Compressing Audio before Shrinking a DVD (LPCM/ac3 5.1ch -> mp2/ac3 2ch) (http://forum.doom9.org/showthread.php?s=&threadid=84887)


Ok... looks like exactly what i want to do - will try it as soon as possible. One more question - will the 5.1 source be encoded to stereo including dolby pro logic II signal - or will additional steps, other tools be neccessary ?

[manono]

Hi-

I hope you're PAL, as MP2 is no good for NTSC. Standalones may or may not play it, but it's not in the specs for NTSC DVD.

[Malcolm]

@Psythorn
You can use whatever tool you want to re-encode the 5.1 stuff to 2.0. So if BeSweet or HeadAC3e will do this - fine. i cannot tell..

@manono
MP2 *is* in the DVD specs for NTSC. It's just that it's optional. See this link: DVD Audio data specifications (http://www.mpeg.org/MPEG/DVD/Book_B/Audio.html)
In contrary AC3 is optional for PAL DVDs. But AFAIK *all* PAL DVD players do support it! So i hope the same applies to NTSC DVD players...
If you want to use AC3 - fine! But i suggest using HeadAC3e then, *not* BeSweet!

greetings,
Malcolm

[manono]

Wow. Learn something new every day. I should have known better than to contradict something you said, Malcolm, without being very sure. Thanks for the heads-up.

[Malcolm]

You're welcome :D