0

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

Improve this question
2
  • You'll want to try the decklink device - ffmpeg.org/ffmpeg-devices.html#decklink
    – Gyan
    Mar 26 '18 at 15:45
  • Thanks Mulvya, I am trying that at the moment but still having an issue to include the SDK packages into FFMPEG, do you have the instruction for that ? is there an FFMPEG version built --with-decklink ?
    – Манаф Иракский
    Mar 27 '18 at 5:08
0

Manaf-2:~ manaf$ ffmpeg -f -format_code Hi50 -f decklink -i 'UltraStudio Express' -c:a copy -c:v copy output.avi

ffmpeg version 2.8.3 Copyright (c) 2000-2015 the FFmpeg developers built with Apple LLVM version 9.0.0 (clang-900.0.39.2) configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-decklink --enable-vda libavutil 54. 31.100 / 54. 31.100 libavcodec 56. 60.100 / 56. 60.100 libavformat 56. 40.101 / 56. 40.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 40.101 / 5. 40.101 libavresample 2. 1. 0 / 2. 1. 0 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 2.101 / 1. 2.101 libpostproc 53. 3.100 / 53. 3.100 [decklink @ 0x7f893a801200] Cannot enable video input

Segmentation fault: 11

Improve this answer
2
  • Upgrade. Use this script to build a new binary: github.com/jb-alvarado/compile-ffmpeg-osx-linux
    – Gyan
    Mar 27 '18 at 5:55
  • I tried the script, it seems its old and am getting lots of errors specially with the OS, the library was build for Mac OS10.10 and I have 10.13. Would you be able to help me with building my own FFMPEG with decklink ? Thanks for your support :)
    – Манаф Иракский
    Mar 29 '18 at 10:36

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.