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Re: Copy protection on dics mastered to dvd-r for "Replication"

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Alex Alexzander
Re: Copy protection on dics mastered to dvd-r for "Replication"
on Jan 25, 2006 at 5:19:28 am

You can indeed use a DVD-R as a master for replication, and you can even use it to store CSS and region information. Even macrovision flags. In fact, it can do ANYTHING a DLT can do, even on a general DVD-R media.

The way a DLT works, is it stores the DVD as a single image file on the tape, called MAIN.DAT This file is huge. The same size as the finished DVD. If you are doing a DVD-9, then two DLT tapes are used, and each one stores one layer of the DVD. Both layers on both tapes are stored as images, again both are called MAIN.DAT.

Now in the case of DDP images on DLT, two other files are also on those DLTs. One is called DDPID, and the other is called CONTROL.DAT.

Now, what about these DVD-Rs?

Well, when you finish your DVD project, depending on the authoring system you are using, you can store the finished DVD, with all these flags set by storing it as a DDP IMAGE.

For example.

In DVD Studio Pro, you can create the DDP image to your hard drive, rather than to a DLT tape. That DDP image is exactly the same image that would normally be recorded to tape. The DVD-R is used as a UDF file system, which is cable of storing files greater than typical ISO9660 CDs. Those store single files no greater than 1 GB. But pure UDF stores files of much larger sizes. For this reason, you can store a finished DDP image onto a DVD-R as long as you do so with a pure UDF format, and store it not as a VIDEO_TS, but as the DDP IMAGE file. When you do this, you use the DVD-R exactly the same way a DLT tape is used. It contains the very same data a DLT contains.

If you are creating a DVD-9, then you would store Layer 0 on one DVD-R as a DATA UDF image, and the other layer, i.e. Layer 1, would be another DVD-R also as UDF DATA, with the second layer's MAIN.DAT image file.

Now, if you do not use DVD Studio Pro, then you will need an application that can create these images for you. Gear Software's Gear Pro Mastering Edition for Windows can create these images, but it doesn't work perfectly with CSS from what I can tell. Right now, your best bet is use an application on the Mac called DVDAfterEdit. That application can convert any VIDEO_TS folder, for DVD-5 or 9, into DDP tape images on the hard drive. Once you have those, you will burn the layer 0 folder to a DVD-R using Toast's Pure UDF DVD data format option. You do this for both layers, and ask your replicator if they can accept them this way. Many can, and will know all about it.

-Alex Alexzander

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