> ./ffmpeg -f decklink -i 'Intensity Pro 4K' -acodec copy -vcodec copy output.avi

ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 6 (SUSE Linux)
  configuration: --enable-decklink --extra-cflags=-I/home/operator/Downloads/ffmpeg-3.0.2/include/ --extra-ldflags=-ldl --extra-libs=-ldl
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
[decklink @ 0x362ffa0] Cannot enable video input
Intensity Pro 4K: Input/output error