Sorry for the many questions
Because we work within a satellite channel and problems that I have not found a solution to
I have a blackmagic DeckLink SDI card 4 input Conductive
However, only one port appears in the main menu
Trial version for the 30th day
I think that this card configured for 4K in/out, in the official datasheet it only support 2 Port as 1 IN and 2 port as 1 OUT
https://www.blackmagicdesign.com/products/decklink/techspecs/W-DLK-25
So I suggest that you reconfigure the card in HD mode using Blackmagic desktop software so you can get 2 IN/2Out.