I have Black magic UltraStudio Express that captures SDI or HDMI and Connected to MacBook via Thunderbolt when I list devices I get the Audio but not the video :
$ ffmpeg -f avfoundation -list_devices true -i ""
ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.3.0/include/openjpeg-2.3 --enable-nonfree
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
[AVFoundation input device @ 0x7fa261600d80] AVFoundation video devices:
[AVFoundation input device @ 0x7fa261600d80] [0] FaceTime HD Camera
[AVFoundation input device @ 0x7fa261600d80] [1] Capture screen 0
[AVFoundation input device @ 0x7fa261600d80] [2] Capture screen 1
[AVFoundation input device @ 0x7fa261600d80] AVFoundation audio devices:
[AVFoundation input device @ 0x7fa261600d80] [0] Blackmagic Audio
[AVFoundation input device @ 0x7fa261600d80] [1] Built-in Microphone
: Input/output error
Any Idea why my FFMPEG does not see the device, Btw, other application sees the video just fine.
Thanks