ISO doesn't preserve 5.1 soundtrack?

[UncleBose]

Hello
I read somewhere that ripping a DVD into an ISO image does not preserve the Dolby Digital 5.1 soundtrack from the disc. Is that true, and is there a format to use in creating a DVD image that would preserve the 5.1 soundtrack?

[Noahtuck]

An ISO is nothing more than a "container" which contains whatever you put in it.
So either you misunderstood what was "written" or whoever wrote it is a clueless idiot

[neomaine]

UncleBose,

An ISO, using it in the sense of copying a DVD/CD to a hard drive (or burning to a cd/dvd) does not lose ANY of its content. If there is a loss, its due to the software used and for a specific purpose.

For the purposes your alluding to, Imgburn is one of the tools of choice among many.

To do this a package would have to actually rebuild the DVD.
- Read from the DVD
- Decrypt on the fly
- Reencode on the fly (the audio anyway)
- Build a new burnable ISO

It doesn't make any sense to do that.

[UncleBose]

I most likely did misunderstand what was written...

Here's exactly what it said, from MagicISO's tutorial pages:

"Going by the more restrictive definition, an "ISO" is created by copying an entire disc, from sector 0 to the end, into a file. Because the image file contains "cooked" 2048-byte sectors and nothing else, it isn't possible to store anything but a single data track in this fashion. Audio tracks, mixed-mode discs, CD+G, multisession, and other fancy formats can't be represented."

http://www.magiciso.com/tutorials/miso-whatiso.htm

In the program itself, when selecting which format to use, it says ISO images are for "All kinds of DVD disc and Data CD with single track."

I've been using DVD Decrypter to make the ISOs, and just wanted to make sure that if I were to mount and play the ISOs, or burn them to a disc and play in a standalone player, that the 5.1 soundtracks (and everything else, for that matter) would be preserved.

[Squash]

UncleBose,

They're not talking about audio tracks within the movie. ISO is fine for DVDs regardless of the number or type of audio tracks.

Some other types of discs, such as games, may contain subchannel data or metadata in separate data tracks and you'd want to use a multi-track capable format like CloneCD's ccd/sub/img or Nero's nrg or Alcohol's mdf/mds format. CDRWin's bin/cue format is pretty common. In addition to the 2048 bytes of data, it also includes 304 bytes of metadata, giving it a sector size of 2352 bytes.

I remember running into this a long time ago trying to back up my Starcraft game CD. As I remember, the audio data was in a subchannel. When I made an ISO of it, the audio in the between-mission briefings was all messed up, while a CloneCD image worked fine.

[Noahtuck]

UncleBose,

An ISO, using it in the sense of copying a DVD/CD to a hard drive (or burning to a cd/dvd) does not lose ANY of its content. If there is a loss, its due to the software used and for a specific purpose.

For the purposes your alluding to, Imgburn is one of the tools of choice among many.

To do this a package would have to actually rebuild the DVD.
- Read from the DVD
- Decrypt on the fly
- Reencode on the fly (the audio anyway)
- Build a new burnable ISO

It doesn't make any sense to do that.

Removing audio tracks does NOT require any type of encoding or reencoding of anything, and no all in one or seperate rippers and or transcoders reencodes any audio in any way.

[UncleBose]

Thanks everyone. Very helpful.