DVD9 to DVD5 How to compress the audio?

[Hollow Oddities]

Hi

I want to backup Best Of Bowie DVDs. The problem is that the audio is in LPCM. I've tried Intervideo DVD Copy 2 for the Disc 1 and the results are not very good, a lot of compression artifacts due to it's long duration (over 2 hours) and the LPCM audio is taking over 1gb of space.

What I want to do is to compress the audio to .MP2 so I can have more space for the video. I was wondering if there is any software I can use for the shrink, keeping the original dvd structure but letting me choose the audio track I want from another source, in this case a .mp2 file.

[Timmychuck]

InterVideo DVDCopy 2 is know have promlems.
Try using a diffrent dvd program. Like DVD2one, clonedvd or
DVD Shrink. Dvd Shrink is free.

[yoda313]

Hello,
Dvdshrink is an excellent option. But, you need a dvd burning program to burn the video_ts directory to the dvd.

If you want to keep using your program try besweet. It will convert ac3 to mp2 for you. However, if you put it in tmpgenc you'll need to correct it with besplit I believe. Or possibly ifoedit may let you drop in the smaller .mp2 file, not sure about that one.

By all means try dvdshrink or another freeware transcoder. It's giving me excellent results !
Kevin

[Shocker Milwaukee]

DVD Shrink is not an option, because it will only shrink the video. Hollow Oddities stated that the audio was in LPCM format, so conversion from ac3 to mp2 is also useless.

[nufan292]

Well you could always seperate audio and video, re-encode each, then reauthor, but you won't have original menues.

[Hollow Oddities]

I stop using DVD Shrink after I saw the results on my X Files TV Series backups, lots of freezes and VCD quality in some parts. Anyway, it doesn't compress the audio.

I want the exact DVD structure but with compressed audio. The audio compression is not a big deal, I already converted the 1gb wav into a 220mb mp2.

[wulf109]

You coudl re-author. De-multiplex and use ffmpegui to convert the LPCM to AC3. Then use TMPEG Author or other aothoring progam. You lose menus,if you care. You could use IFOEDIT or REJIG to aothor,they allow you to save chapter stops as a TXT file.

[Hollow Oddities]

I want to keep the menues, everything. Any ideas?

[nufan292]

No ideas, unless you can afford scenarist.

[Shocker Milwaukee]

Compressing the audio as well as the video will require some effort & some skill. As previously stated, you will have to separate the video & audio (demux?), compress the audio (to ac3?), then combine the new compressed audio stream with the video stream (remux?). You can save space by compressing the video as well as the audio (either before or after). You can compress video after the fact with DVD Shrink.

[andkiich]

This is what I would do:

1) Rip the DVD to your HHD.
2) Shrink the video with DVDShrink or your favorite transcoder.
3) Demux to elementary streams(can be done with VobEdit, or use whatever you have.
4) Use BeSweet to convert the LPCM audio to AC3.
5) Download DVD-Lab Pro or TMPGENc DVD Author and rebuild DVD
6) Burn with your fav program.

Note - You will not be able to keep the original menus, but you can create new ones, quite easily.

[steptoe]

The way I used to do it is using :

[/u]DVDDecrypter
To rip the entire DVD, so you can choose what to use, or use AnyDVD or DVD Region-Free to rip straight off the DVD if yoy wish. I prefer ripping

AC3Tool
This will extract the AC3 audio, then use the built-in conversion of AC3 to WAV to prevent loss of quality

DbPowerAmp
Excellant freeware audio converter, plus more especially with PowerTools installed, this will convert a WAV to MP2, just get the MP2 plug-in (you can decide the bitrate)

TMPGEnc DVD Author
Use this to get what stuff you want, then choose the option to add an external audio track, and simply choose where you're MP2 audio is

[adam]

Why does everyone keep saying he'll lose menu's? Just demux, encode, and reauthor only the vobs containing the movie. Stick the new vobs back into the original VIDEO_TS directory and run IFOUpdate. Done.

If you don't touch the first vob in the titleset then the menu's stay intact. Then its just a matter of updating the IFO's.

For this to work you may have to author a certain way, and there's really no way around just learning how to read IFO's and knowing how to recreate its structure. But for most DVDs there's nothing to it, just a single PGC. TMPGenc DVD Author or even IFOEdit are sufficient DVD Authoring programs for DVDs like this.

The difference between keeping and loosing menu's is literally a 30 second process. You don't have to lose menu's just because you re-encode/re-author instead of transcode.

[Brent212]

I'm currently doing the same thing and wanted to see if the process I'm using will work (I'm not through and won't be able to work on it until tonight).

I ripped the movie to my HD with decrypter. I copied the VOB's to another directory to work with. I then switched the extensions from VOB to mpg. I'm using TMPGEnc Plus to demux each .mpg to .mpv and .wav. I then convert the .wav to a .mp2 with TMPGEnc Plus and remux the .mpv and .mp2 back to the original .mpg. After I'm done I'll rename all the .mpg's back to .VOB and replace the original VOB's with these new ones.

Will this work? The only difference will be the audio in each VOB is mp2 instead of lpcm, so the file sizes will be smaller. Do I need to run IFOUpdate, like adam said? Chances are that the DVD will still need a little bit of shrinking (but much less for sure), so I'll use DVD Shrink to compress the video. But I'll have the original menus and everything if it works.

So my question is: will it work?

[waheed]

Compressing the audio as well as the video will require some effort & some skill

You CANNOT COMPRESS Audio, any transocer will not compress audio, only video, if you want to reduce the size of the audio, then re-encoding is neccessary.

There is a difference between compress and re-encode.

[adam]

Brent you cannot just rename an mpg program stream to .vob. You must use authoring software to create the vobs. Otherwise, yes it will work but you will have to use IFOUpdate afterwards.

[Brent212]

Even if the .mpg came from a .VOB that was just demuxed and then remuxed?