HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows.

Supported sources: HandBrake is not limited to DVDs: it will now accept practically any type of video as a source.

Outputs:

• File format: MP4, MKV, AVI or OGM
• Video: MPEG-4 or H.264 (1 or 2 passes or constant quantizer/rate 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