ffmpeg MLV (Magic Lantern Raw) to ProRes fail.

$ nice ffmpeg -i DCIM/100CANON/M16-1742.MLV -c:v prores -threads 3 test-1742-ffmpeg-prores-720p24-`date +%Y%m%d%H%M%S`.mov
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Jun 16 2014 19:15:15 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --enable-gpl --enable-nonfree --enable-version3 --enable-dxva2 --enable-vaapi --enable-vda --enable-vdpau --enable-bzlib --enable-frei0r --enable-gnutls --enable-libdc1394 --enable-libfaac --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxvid --enable-openssl --enable-x11grab --enable-zlib
  libavutil      52. 89.100 / 52. 89.100
  libavcodec     55. 67.100 / 55. 67.100
  libavformat    55. 43.100 / 55. 43.100
  libavdevice    55. 13.101 / 55. 13.101
  libavfilter     4.  8.100 /  4.  8.100
  libswscale      2.  6.100 /  2.  6.100
  libswresample   0. 19.100 /  0. 19.100
  libpostproc    52.  3.100 / 52.  3.100
[mlv @ 0x2e1ecc0] unsupported tag BKUP, size 20
    Last message repeated 51 times
Input #0, mlv, from 'DCIM/100CANON/M16-1742.MLV':
  Metadata:
    guid            : 0x3c16e3af8b3bef25
    lensID          : 198
    picStyleName    : Faithful
    isoValue        : 100
    wbs_ba          : 0
    isoMode         : manual
    isoAnalog       : 72
    digitalGain     : 0
    time            : 2014-06-16 17:42:58
    focalLength     : 50
    focalDist       : 0
    aperture        : 140
    stabilizerMode  : 0
    autofocusMode   : 0
    flags           : 0x0
    cameraName      : Canon EOS 6D
    cameraModel     : 0x80000302
    cameraSerial    : 1C6F379DB2
    lensName        : EF50mm f/1.4 USM
    wb_mode         : 9
    kelvin          : 5500
    wbgain_r        : 496
    wbgain_g        : 1024
    wbgain_b        : 616
    wbs_gm          : 0
    picStyleId      : 133
    contrast        : 0
    sharpness       : 0
    saturation      : 0
    colortone       : 0
    shutterValue    : 3027
  Duration: 00:00:11.39, start: 0.000000, bitrate: 310252 kb/s
    Stream #0:0: Video: rawvideo (BIT[16] / 0x10544942), bayer_rggb16le, 1280x720, 23.97 tbr, 23.97 tbn, 23.97 tbc
[swscaler @ 0x2e4da80] unsupported bayer conversion
Assertion 0 failed at libswscale/swscale_unscaled.c:1655
Aborted (core dumped)