InfoComm 2019: BlackMagic Demos ATEM Constellation 8K in Real-Time June 25, 2019 | Home / June 25, 2019 rave-video / InfoComm 2019: BlackMagic Demos ATEM Constellation 8K in Real-Time InfoComm 2019: BlackMagic Demos ATEM Constellation 8K in Real-Time