[needs-packaging] Package handbrake: multithreaded video transcoder

HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded video transcoder, available for MacOS X, Linux and Windows.

http://handbrake.fr/?article=download

Supported sources:

    * Any DVD-like source: VIDEO_TS folder, DVD image or real DVD (unencrypted--protection methods including CSS are not supported internally and must be handled externally with third-party software and libraries), and some .VOB and .TS files
    * Most any multimedia file it can get libavformat to read and libavcodec to decode.

Outputs:

    * File format: MP4, MKV, AVI or OGM
    * Video: MPEG-4, H.264, or Theora (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

HandBrake uses a lot of (L)GPL librairies from the Linux world:

    * liba52 (AC3 decoding)
    * libavcodec (decoding, picture cropping, scaling and deinterlacing, MPEG-4 encoding)
    * libdvdread (DVD navigation)
    * libfaac (AAC encoding)
    * libmp3lame (MP3 encoding)
    * libmp4v2 (MP4 muxing)
    * libmpeg2 (MPEG-2 decoding)
    * libogg (OGM muxing)
    * libsamplerate (audio resampling)
    * libvorbis (Vorbis encoding)
    * libx264 (H264 encoding)
    * libxvidcore (MPEG-4 encoding)