Comment 1 for bug 989934

I have a similar problem trying to convert ProRes422 MOV files to OGV with ffmpeg2theora-0.28 on MacOS 10.6.8:
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Prompt $ ffmpeg2theora --videoquality 8 JohnPilgrim_ColorReel_v10a_2011Jan17_Superless.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'JohnPilgrim_ColorReel_v10a_2011Jan17_Superless.mov':
  Metadata:
    major_brand : qt
    minor_version : 537199360
    compatible_brands: qt
    creation_time : 2011-01-18 03:00:54
  Duration: 00:03:00.18, start: 0.000000, bitrate: 102480 kb/s
    Stream #0.0(eng): Video: Apple ProRes 422, 1920x1080, 100153 kb/s, PAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc
    Metadata:
      creation_time : 2011-01-18 03:00:54
    Stream #0.1(eng): Audio: pcm_s24le, 48000 Hz, 2 channels, s32, 2304 kb/s
    Metadata:
      creation_time : 2011-01-18 03:00:54
    Stream #0.2(eng): Data: tmcd / 0x64636D74
    Metadata:
      creation_time : 2011-01-18 03:03:41
  Pixel Aspect Ratio: 1.00/1 Frame Aspect Ratio: 1.78/1
[swscaler @ 0x18c6800] (null) is not supported as input pixel format

  0:03:00.17 audio: 80kbps video: 0kbps, ET: 00:00:00, est. size: 1.7 MB
  0:03:00.18 audio: 80kbps video: 0kbps, time elapsed: 00:00:08
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ProRes is a very common intermediate and mastering codec in Mac video post-production workflows,
and really needs to work with ffmpeg2theora.