MplayerRip is a an interface wich use easier Mplayer and Mencoder.
mplayer is use only for playing and preview video. You can dump a video from DVD to your HD.
Mencoder can manipulate video and audio. It allow to convert a video to an other format like Vob to Divx. It can use filter like cropping, resizing,

Requirements:
* Mplayer

The license of this software is Free, you can free download and free use this video utility software.