There are so many software of DVD ripper whic help you to convert, rip the clips of DVD to hard driver, then can be played by portalbe devices or mp4 player. there are 3 free DVD rippers which are free to use for dvd funs.
1. Handbrake - is an open source dvd ripper, GPL - licensed , multiplatform, multithreaded video transcoder, available for Mac OS X, Linux and windows
http://handbrake.fr/downloads.php2. DVD Shrink - is free software to backup DVD discs. You can use this software in conjunction with DVD burning software of your choice, to make a backup copy of any DVD video disc.
DVDShrink will also burn your backup DVD, if you have installed the latest version of Nero. You can also download a demo version of Nero here. If you already possess alternative burning software and prefer to stick with it, then you can still use DVD Shrink. The output from DVDShrink can be saved as files on your hard drive, which you can then burn with software of your choice.
DVDShrink is free software. You should never pay for DVDShrink.
http://www.mrbass.org/dvdshrink/dvdshrink32016_jp_setup.zip 3. DVD Decrypter - This rips encrypted dvd video files onto your harddrive for further processing. It removes region code protection and macrovision. You can either A) rip all files press F or B) .ISO mode press R. It is totally free to use for users
http://www.mrbass.org/dvdrip/SetupDVDDecrypter_3.5.4.0.exeNote : DVD files include VOB, IFO and BUP files. IFO (Info) files contain all the information a DVD player needs to know about a DVD so that the user can navigate and play all DVD content properly (e.g., where a chapter starts, where a certain
audio or subtitle stream is located, information about menu functions and navigation, etc.). BUP (Backup) files are an exact copy and backup of IFO files in case of corruption. VOB files without IFO or BUP files do not allow DVD menu navigation. Images, video and audio used in DVD menus are stored in VOB files.
