ffmpegX is a Mac OS X graphic user interface designed to easily operate more than 20 powerful Unix open-source video and audio processing tools including ffmpeg the "hyper fast video and audio encoder" (http://ffmpeg.sf.net/), mpeg2enc the open-source mpeg-2 encoder and multiplexer (http://mjpeg.sf.net/MacOS/) and mencoder the mpeg-4 encoder with subtitles support (http://sf.net/projects/mplayerosx).

Features:

• As simple as 1.2.3 : Drop a file, choose a destination format, and click "Encode".
• Reads the following input formats: MPEG-1, MPEG-2, MPEG-4, DIVX, XviD, non-encrypted VOB and VIDEO_TS, Quicktime .MOV, .DV, .WAV, Real Audio, Real Video, H.263, MP4 H.264, PGM, YUV, PPM, AC3, PCM8/16 bits, mulaw/Alaw, WMA-1/2, SUN AU format, MP2, MP3, AAC, 3GP, FPS1, ALAC, and even more formats
• Converts the above formats to DivX, AVI XviD, H.264 MP4, MOV, DV, 3GP, Sony PSP, MP2, MP3, AAC, AC3, MPEG-1, MPEG-2, VCD, CVD, SVCD, KVCD, KSVCD, DVD, KDVD and MPEG-TS with complete control over encoding options.
• Super-fast. Many conversions are faster than realtime. DIVX encoding on a G5 dual is twice as faster as realtime.
• Queue encodings in the ffmpegX Progress window.
• Includes a full-featured universal video player (mplayer) supporting VOB and text subtitles, with choice of fonts, font sizes and international text encodings including Japanese, Chinese, Russian, Greek and more.
• Supports subtitles in VobSub, SubRip, MicroDVD, SubViewer, Sami, VPlayer, RT, SSA, AQTitle, JACOsub and MPsubt formats
• Allows creation of DVD selectable subtitles
• Includes a subtitle converter with OCR from VOB image format to SRT text format.
• Includes a bitrate calculator to control best image quality and target filesize.
• Includes an automatic crop tool.
• Includes a series of video tools like split, join, fix, mux, demux.
• Compresses a non-encrypted DVD to 4GB without reencoding it.
• Reauthors SVCD as DVD.
• Creates DVD image files from VIDEO_TS folders.
• Converts SRT subtitles to DVD Studio Pro 1.5 format.
• Creates AVI or MPG files with two audio tracks.
• Authors as VCD or K/XVCD (.bin/.cue files for burning with Toast by dropping the .bin into VCD window).
• Authors as SVCD, CVD or K/XSVCD (two .img files to be burned in Toast under Multitrack XA window).
• Authors as DVD (/DVD/ folder for burning in Toast DVD mode, and .img file for burning in Disk Image app or Toast disk image mode)

Comments: Fast video conversion, Great GUI

Download: FFmpegX

iSquint

HandBrake

HandBrake is a GPL’d multiplatform, 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. A Windows port is being worked on.

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

Download:here