OGMRip is a library providing a common API for ripping and encoding DVD into AVI/OGM/MP4/Matroska files using a wide variety of codecs. It uses mplayer, mencoder, ogmtools, oggenc and lame to perform all its operations.
vrecoder is a shell wrapper for mencoder (part of MPlayer Project) that simplifies common operations like resizing videos. vrecoder was made for the Sharp Zaurus community.