DVD and dual layer

[Shard92]

Am I correct when I say that movie dvd ( commercial ) are dual layer for the most part? The idea is are DVD rom's able to read dual layer? I've seen dual layer burners but I've never seen a rom that specifically says. I had someone bring that up recently and I believe all roms must be ( at least recent ones ) but I'm not sure.

[Capmaster]

Am I correct when I say that movie dvd ( commercial ) are dual layer for the most part? The idea is are DVD rom's able to read dual layer? I've seen dual layer burners but I've never seen a rom that specifically says. I had someone bring that up recently and I believe all roms must be ( at least recent ones ) but I'm not sure.

Yes. Most commercial releases are dual-layer. They are also referred to as DVD-9, for 9GB DVD.

DVD players will read dual-layer, as will PC DVD-ROM drives.

The dual layer has two layers, one deeper than the other. The laser can see through the top layer when it's focused on the lower one.

The data is written in the opposite direction on one layer than the other. Single-layer DVD-R for example, starts writing the data on the inside near the hub, then writes a long spiral outwards from there. With a dual-layer one layer's start point is the same location on the disc as the other's end point, so layer switching is nearly instantaneous.

Players make this switch all the time and they're nearly indistinguishable.

[Shard92]

thank you for your quick response!!!!

[Capmaster]

thank you for your quick response!!!!

NP 8)

[pijetro]

Capmaster...

Does this mean that potentially ripping and shrinking might be a thing of the past
If so, i guess the next hurdle would be compatibility and prices dropping for Dual layered media..

[Capmaster]

Capmaster...

Does this mean that potentially ripping and shrinking might be a thing of the past
If so, i guess the next hurdle would be compatibility and prices dropping for Dual layered media..

That's what we're all predicting. Worrying about compression ratios on DVDShrink should be a thing of the past ...once DL gets the bugs out and it really takes off, with media prices dropping close to where DVD-5 media costs.

DVDShrink, DVD2One and other rip/decrypt/shrink apps will still have their place, as we will still need to break the encryption. Ahd their interfaces are so easy and smooth. I'll be using them for a long time.

I'm looking for DVD-18 media to show up. Then we can make one-to-one backups of movies like The Stand with no additional compression 8)

[PATMANN]

WHOA! WHOA ! WHOA!!! DVD-18???? The Stand? If i remember correctly, The Stand is DVD-9. Or am I Wrong?

[drjtech]

The Stand was the first, I believe, DVD-18 release. DVD-18 is also known as dual-layer double-sided. In other words, it's a double sided disc with a DVD-9 on each side.

-drj

[Dr_Layne]

I'm looking for DVD-18 media to show up. Then we can make one-to-one backups of movies like The Stand with no additional compression 8)

Now that's funny. What compression would be needed. Burn each side to a DL disc.

Steve

[handyguy]

I prefer to call them double layer, which is one layer on top of the other. Rather than dual layer, which appears as if two layers side by side.

[Capmaster]

The Stand was the first, I believe, DVD-18 release. DVD-18 is also known as dual-layer double-sided. In other words, it's a double sided disc with a DVD-9 on each side.

-drj

Yep. It was the first commercial release on DVD-18.

Now that's funny. What compression would be needed. Burn each side to a DL disc

That's what I said. "No additional compression." All DVDs are compressed. Having blank DVD-18 media means we could do a straight copy of a DL/DS disc to a blank DL/DS disc.

But I missed the funny part

[Dr_Layne]

There is no additional compressoin needed. No re-auhtoring either. Split the dvd-18 to two dvd DL's. That's what I was trying to say. That's why I found your remark funny. But I got your point about DS/DL dvd-18 blank.

Steve

[Capmaster]

There is no additional compressoin needed. No re-auhtoring either. Split the dvd-18 to two dvd DL's. That's what I was trying to say. That's why I found your remark funny. But I got your point about DS/DL dvd-18 blank.

Steve

Yes. That's exactly what I was saying. No additional compression needed, as in the compression when using DSVDShrink to squeeze a DVD-9 onto a DVD-5.

No compression needed. The commercial DVD had been compressed when it was made by the studio, but no ....we don't need to ADD any more compression to fit 18GB onto an 18GB DL disc. It's what I originally said. So I think we agree, but you think I don't agree, or you somehow you interpreted my "no additional compression" remark as meaning "additional compression needed". Whatever. Nobody wants to read any more of our miscommunicating. Onward and upward. Let's move on.

[Dr_Layne]

Over looked the words "one to one back up". All is well.