This Conversion tutorial will guide you an easy way to convert DVD movie to avi,QuickTime MOV, MP4 and other video audio formats, and enable you to rip DVD movies onto computer. Also you can clip segment, set divers output formats from one source DVD files and customize output file size. You will get the movie formats you want with excellent image/sound quality.

Step-by-step Guide: How to convert DVD movie to avi and enable you to rip DVD onto computer?
1、Free download the trial of This DVD to QuickTime Converter, install and run it.
2、Launch DVD to QuickTime converter. The interface is as follows:
3、Click "Open DVD" or "Open IFO files" to import DVD.
Check the files which you want to convert.

4、After loading, all DVD files are checked by default. If you only wish to convert several chapters, just re-check them.
Note: You can click 'Show Chapters' to show all chapters.
5、Click to choose files you want to convert and select a Profile as your output format. Here we choose "MOV - QuickTime".
http://swgcms-www-sharewareguide-net.olym.xilisoft.net/images/guide/imtoo/dvd-ripper-platinum/convert%20dvd%20to%20quicktime%205.jpg
Note: After done this, please recheck the target format.
6、Click "Browse" button to select output path for the converted avi or QuickTime files.
7、Click "Start ripping" to start to convert DVD to QuickTime and MP4.
OK. You have finished converting DVD to QuickTime. Using the same process you can rip DVD onto computer for other video and audio formats.

http://www.sharewareguide.net/Audio-Multimedia/Rippers-Converters/imtoo-dvd-ripper-platinum.html

I prefer Nidesoft Video Converter. It is an excellent video converter with powerful functions. Download and install it here:
http://www.nidesoft.com/downloads/video-converter.exe
and get more information here:
http://www.nidesoft.com/video-converter.html

It surpass other video converters for its unique features:
〉Convert between all popular video and audio formats including AVI, MPEG, WMV, MPEG1/2/4, 3GP, MP4, DVD, VCD, SVCD, MOV, MP3,etc.
〉Convert FLV format (such as youtube, Google Video, Yahoo Video, Myspace Video) to iPod, support video crop mode setting and various output resolutions.
〉Customize output file: setting Video Bitrate, Audio Bitrate, Video Size and Volume.
〉The Video Converter allows preview; Allows you to select target subtitle or chapter.
〉You could keep the default settings or set parameters of the video and audio codes by yourself.
〉Easy and simple to use for beginners.
〉Very fast converting speed and excellent video quality;
〉So easy to use that only a few clicks are enough; Codes are all built-in;
〉Optimized for Processor (SSE2/SSE/MMX/3DNow!) and Graphics Card Acceleration. The new version provides more friendly interface and better quality.
〉Fully optimized for Dual Core, Hyper-Thread processor.
〉Up to 4x faster than other software. Provide >400% converting speed, beyond your imagination;
〉Free Update!!! Very good Day Email Service.
http://www.nidesoft.com/image/screen/video-converter-screen-large.jpg

There are some other DVD Ripper tools which can rip and convert DVD to QuickTime MOV, MP4. Take the following software as examples:

1. ImTOO DVD Ripper Platinum: $45.95
http://www.sharewareguide.net/images/guide/vob-cutter/vob-cutter-start.gif

2. Xilisoft DVD Ripper Standard: $35.95
3. WinXMedia DVD Ripper: $29
4. Aimersoft DVD Ripper: $35

Get the DVD Ripper list and the guide for how to convert DVD to QuickTime MOV, MP4, and other popular videos at http://www.sharewareguide.net/article/Guide/guide:-how-to-convert-dvd-to-quicktime(mov-mp4)-and-enable-you-to-rip-dvd-onto-computer.html

I've found both ImTOO DVD Ripper Platinum and Nidesoft Video Converter on the website: sharewareguide.net.
Who Knows which is better?

Wow, so many DVD rippers? Yeah, I also want to know which is the best one?

I consider that ImTOO DVD Ripper is more powerful.