[FFmpeg-user] DeckLink Mini Monitor 4K

[Marton Balint]

On Sat, 4 Aug 2018, Mustafa Al Ani wrote:

> Hi,
>
> In my setup I have two decklink cards, 'DeckLink SDI Micro' and 'DeckLink
> Mini Monitor 4K'
>
> I'm trying to get "DeckLink Mini Monitor 4K" to work with ffmpeg but it
> doesn't seem to be detected by ffmpeg.
>
> When I run "ffmpeg -f decklink -list_devices 1 -i dummy" I can only see the
> micro card!
>
> ffmpeg -f decklink -list_devices 1 -i dummy
> ffmpeg version 4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
>  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
>  configuration: --enable-libndi_newtek
> --extra-cflags='-I/home/iohub/ffmpeg/ndi/include
> -I/home/iohub/ffmpeg/decklink/Linux/include'
> --extra-ldflags=-L/home/iohub/ffmpeg/ndi/lib/x86_64-linux-gnu
> --enable-libsrt --enable-decklink --enable-libx264 --enable-ffplay
> --enable-nonfree --enable-gpl --enable-libfdk-aac --enable-libx265
>  libavutil      56. 14.100 / 56. 14.100
>  libavcodec     58. 18.100 / 58. 18.100
>  libavformat    58. 12.100 / 58. 12.100
>  libavdevice    58.  3.100 / 58.  3.100
>  libavfilter     7. 16.100 /  7. 16.100
>  libswscale      5.  1.100 /  5.  1.100
>  libswresample   3.  1.100 /  3.  1.100
>  libpostproc    55.  1.100 / 55.  1.100
> [decklink @ 0x3566c80] Blackmagic DeckLink input devices:
> [decklink @ 0x3566c80]  'DeckLink SDI Micro'
> dummy: Immediate exit requested

Mini Monitor is an output only card, and you are listing the input 
devices. For output devices you should do something like:

ffmpeg -i test.avi -f decklink -list_devices 1 dummy

The manual gives this example as well.

Regards,
Marton