HandBrake
Yozoさんに教えていただきました。ありがと～！
What is HandBrake?
HandBrake is a GPL'd multi-platform, multithreaded DVD to MPEG-4 ripper/converter. HandBrake was originally available on the BeOS, but now has been ported over to MacOS X and to GNU/Linux.
Features:
* Can encode directly from DVDs (even encrypted ones) or from VIDEO_TS folders
* Supports AC3, LPCM and MPEG audio tracks
* Outputs MP4, AVI or OGM files
* Outputs AAC, MP3 or Vorbis audio
* Supports 2-pass encoding
* Supports encoding of two audio tracks
* Includes a bitrate calculator
* Supports picture deinterlacing, cropping and scaling
Known limitations:
* Does not handle DTS audio tracks
* Does not handle single VOB files or any other file format