HandBrake
Multithreaded DVD to MPEG-4 ripper/converter.
Quoted form: http://handbrake.m0k.org/

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FreeSMUG tutorial
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.

Click Image To Enlarge
Screenshots Download
FreeSMUG tutorial
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:
- Supported sources:
- Any DVD-like source: VIDEO_TS folder, DVD image or real DVD (even encrypted)
- PAL or NTSC
- AC-3, LPCM or MPEG audio tracks
- Outputs:
- File format: MP4, AVI or OGM
- Video: MPEG-4 or H.264 (1 or 2 passes or constant quantizer encoding)
- Audio: AAC, MP3, Vorbis or AC-3 pass-through (supports encoding of several audio tracks)
- Misc features
- Chapter selection
- Basic subtitle support (burned into the picture)
- Integrated bitrate calculator
- Picture deinterlacing, cropping and scaling
- Grayscale encoding
