of the video stream is decoded and scraped. DVD Shrink operates in two main modes, "Reauthor" and "Full Disk". In "Reauthor" mode, the interface allows the user to choose specifically which DVD elements (Main Title, Menus, audio tracks and subtitles, and Special Features) to retain on the "shrunken" DVD; the Menu clips are stored in folders and some of them are playable. The compression is automatic if the Main Title only is selected, to fit it onto the selected size of DVD. If Special Features are also selected, their compression may be manually selected at the minimum possible using the Custom Ratio option, to give disk space to the Main Title. In "Full Disk" mode, DVD Shrink allows the user to make a functionally identical backup copy without changes; alternatively random audio/subtitle streams can be deselected. Sections of the DVD, such as unwanted messages or logos/titles, can be replaced with still images, saving disk space for the Main Title. The compression can be automatic or manual, which allows selection of greatest compression for Menus or Special Features, saving disc space for the Main Title. In either mode, the program has options to facilitate the stripping of the CSS copy protection, User operation prohibition (prohibiting skipping over previews or "FBI Warnings" and so on), and also allows the copy to be either made region-free (the default setting) or set for any region code. Extra software (such as AnyDVD, AVS Video Converter, or DVD Decrypter) may be required to remove more recent forms of copy protection such as Macrovision Ripguard. DVD Shrink can also shrink hard disk files already ripped by programs that can overcome more recent copy protection systems, but that do not offer the 2-layer to 1-layer compression. Once the DVD content has been reduced in data size, the resulting output is an ISO file or a DVD VIDEO TS folder. The program cannot burn these images itself, as it does not contain a built-in burning engine. It can however automatically pass the burning job to either Nero (version 7 or lower), DVD Decrypter or CopyToDVD as long as these programs are installed. This process appears transparent to the end user. To burn with ImgBurn it's possible to either copy over imgburn.exe to the DVD Decrypter folder and rename it to dvddecrypter.exe (both engines use the same commands as they are coded by the same programmer) or use the hacked