I recommend you a free software which can help you convert Rip DVD and Convert Video andBackup DVD. It called "Next DVD Ripper".
http://www.google.com/search?hl=en&q=http%3A%2F%2Fwww.nextvideosoft.com%2Fnext-dvd-ripper-free.html&btnG=Google+Search&aq=f&oq=
Next DVD Ripper is a free DVD ripper and video converter with easy-to-use graphicalinterface, fast converting speed, and excellent video quality. It can rip DVD movies and convert almost all video formats including DVIX, Xv iD, MOVE, RM, RM VB, MPEG, VB, DVD, MV, and AVI to MPEG-4 movie format for iPod, PSP, PS3, iPhone, XBox360, Zune, Apple TV, Archos, iRiver PMP, Epson Player, Creative Zen, Rubi Blue, Sony Walkman, Commodore PMX, Palm TX, Game Boy, SmartDisk, Windows Mobile Smart phone, Nokia, BlackBerry, Ketti, LG, Sony-Ericssonon, Samsung mobile phone, etc.