Outputting video with alpha to a deltacast

Hello,

Really quick and specific question here, i wish to output a live 7680*2160 video stream from touch to 2 deltacast DELTA-h4k2-elp 20 on 2 other computers and, as i have not foreseen, using correctly placed windows comp gets me the black bg whereas i want the alpha channel to composite onto another video playback.

Would using the direct display out top be a solution ? and would this work with nvidia rtx 5090 (it’s not clear if it works only with quadro etc for me ? I would like to know before buying a windows pro enterprise license. Thanks a lot; or if there’s other solutions i’m taking them.

HDMI does not support alpha channel in general, so Direct Display Out TOP doesn’t help with this either. You may have to use a format such as NDI, which supports alpha.