We use Decklink 8K pro card As following
First port as first input with 1080/50i resolution
Second port as second input with SD resolution
third port as video output with SD resolution
We have build 3D scene and 2 video wall using decklink input as its color maps
the problem that when we use video recorder Compound with 1080/50p H264/mp4
Video walls displaying" To Can't Keep latency Error message" instead of decklink video feed
When you use live inputs you should never specify an explicit framerate for Video Recorder. Please use the Realtime option.
Explicit framerate in the recorder is for non-realtime rendering, when you only want to render as fast as possible. Naturally it's not suitable for live inputs.