HandBrake has been originally available on the BeOS platform, but now has been ported over to Mac OS X and to GNU/Linux.

Here are some key features of "HandBrake":

Supported sources:
· Any DVD-like source: VIDEO_TS folder, DVD image or real DVD (encrypted or unencrypted, but protection methods other than CSS are not supported and must be handled externally with third-party software), and some .VOB and .TS files
· PAL or NTSC
· AC-3, DTS, LPCM or MPEG audio tracks

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

Limitations:

· Does not handle DTS audio tracks
· Does not handle single VOB files or any other file format

What's New in This Release: [ read full changelog ]

· Better PMT processing
· Basic underlying support for live previews (encode from a seek point for a set number of frames)
· Better searching for IDR frames in H.264 streams
· Preset changes (iPhone goes CRF, some old Apple presets resurrected as Legacy)
· Assorted bug fixes