[FFmpeg-user] Can't read DNxHD video

[Elliott Balsley]

When I try to run ffmpeg with an MXF DNxHD source file, I get the
following errors.  I've tried three variants of the codec:
36 (8 bit 4:2:2)
220x (10 bit 4:2:2)
350x (10 bit 4:4:4)

$ ffmpeg -i /Volumes/PETSquad_edit/temp/dnx3601731497.mxf test.mp4
ffmpeg version N-65523-g9a16214 Copyright (c) 2000-2014 the FFmpeg developers
  built on Aug 11 2014 10:33:57 with Apple LLVM version 5.1
(clang-503.0.40) (based on LLVM 3.4svn)
  configuration: --enable-gpl --enable-version3 --enable-nonfree
--enable-libass --enable-libbluray --enable-libfdk-aac
--enable-libmp3lame --enable-libvpx --enable-libx264
--enable-libfreetype --enable-libopenjpeg --enable-libvorbis
--enable-libtheora
  libavutil      54.  1.100 / 54.  1.100
  libavcodec     56.  0.100 / 56.  0.100
  libavformat    56.  0.100 / 56.  0.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  0.100 /  5.  0.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  0.100 /  1.  0.100
  libpostproc    53.  0.100 / 53.  0.100
[mxf @ 0x7fa274005200] Could not find codec parameters for stream 0
(Video: none, 1920x1080): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
/Volumes/PETSquad_edit/temp/dnx3601731497.mxf: could not find codec parameters
Input #0, mxf, from '/Volumes/PETSquad_edit/temp/dnx3601731497.mxf':
  Metadata:
    uid             : 640faaa6-e890-4cc9-be15-52c5464d8a77
    generation_uid  : c40e98b6-994d-4c21-968f-e0756aeb8d3e
    company_name    : Blackmagic Design
    product_name    : DaVinci Resolve
    product_version : 10.1.5
    product_uid     : 057cd849-178a-4b88-b4c7-825af8761b34
    modification_date: 2014-08-11 17:29:06
    application_platform: libMXF (Unknown)
  Duration: 00:00:02.25, start: 0.000000, bitrate: 37750 kb/s
    Stream #0:0: Video: none, 1920x1080, 24 fps, 24 tbr, 24 tbn, 24 tbc
No decoder for stream #0:0, filtering impossible
Error opening filters!