Basics about DVD copy

Nowadays, if you search the word "DVD" or "DVD copy", the window will abound with varieties of DVD copy software or other. Yes, DVDs are very hot on today's market and many different kinds of DVD software spring up subsequently. Here are some basics about DVD copy which will help you somewhat.

First, we have to know what is on a DVD. If you have purchased a DVD, you need to put it in your DVD-ROM drive to see the contents. Usually you will find several folders with files in it, usually a VIDEO_TS and AUDIO_TS folder. Literally we know that VIDEO_TS folder is used to store DVD movies. Enter the folder we will find three kinds of files: .VOB, .BUP and .IFO files. The actual movie files exist in the VOB files, which is a MPEG-2 encoded file. MPEG-2 is a method of compression for movies. The IFO files are about the information, used by your DVD player. It gives the DVD player information on what .VOB files to load and when to start a new chapter, etc. The BUP files are generally a backup of IFO files and will be useful only when IFO files become unreadable.

Next, we should have an understanding of DVD protections. Copying a DVD is not as easy as we imagine, in other words, is not a matter of just two steps. DVD movies are usually protected with CSS, which is developed and adopted by the Hollywood Studios to protect their movies from being pirated. But there are many kinds of software to decrypt the movies, such as DeCSS, a very powerful solution but is limited now. Some CSS movies often contain Macrovision protection, but it will be also decrypted by software that removes CSS protection.

Last but not least, people are sometimes confused about the capacity of DVD discs, so problems of lack for capacity will inevitably happen. Currently DVD recordable discs can contain about 4.7GB of data, and they are referred to as DVD-5. However, many movies released are about 9GB of data (DVD-9), and we can indicate that a DVD-9 movie can not fit on a DVD-5 disc. To make it possible, there are three ways for you: remove data, shrink data, split data, and you can learn about the details online.