Just tested using one of the popular software for DVD ripper from ImTOO Software Studio, DVD Ripper Platinum. Never try to convert one of my favorites DVD movies to my Google Android-based mobile phone. Hopefully can accompany me in a trip by watching movies using my phone next weekend.
After a quick installation, the software is ready to begin ripping from DVD to AVI. Conversion feature are extensive, can convert to different type of format such as AVI, MPEG, WMV, XviD and many more to mostly existing portable players.
Although the software has a lot of options, the interface and layout are quite nice and makes me feel easy to use for a beginner. The default setting is using high quality version, remember to change it to different optimization that suit your needs.
For more details you can visit their site here and mac version here.