VLC has built-in support for Blackmagic SDI output cards: https://github.com/videolan/vlc/blob/master/modules/video_output/decklink.cpp https://github.com/vide

VLC has built-in support for Blackmagic SDI output cards: https://github.com/videolan/vlc/blob/master/modules/video_output/decklink.cpp https://github.com/videolan/vlc/blob/master/modules/video_ou... Though a quick search through online forums suggest that module isn't compiled into Ubuntu's version of VLC by default, so you may need to compile your own version: https://gist.github.com/afriza/cd9ce01a7b47b9bd3f192e95af1a07e5 https://gist.github.com/afriza/cd9ce01a7b47b9bd3f192e95af1a0...