Ahoy -

We are using a Decklink 4k Extreme with an SDI camera input and I am trying to use the card's HDMI output as an External Renderer.

Now, when vMix is up and running and the SDI input is added, the HDMI output of the Decklink shows the camera feed. But, that feed is not actually mixable, it's just the camera (even switching the output on the Fullscreen tab doesn't switch this display). If/when vMix is closed or the Input is not active in vMix, the camera feed does NOT show up on the HDMI display.

Whenever I Start the External Output I get the error -

"The selected External Renderer Device is in use or does not support the selected format. Please check your External Output settings and try again.
StartStopExternal.Decklink Video Render
No combination of intermedia filters could be found to make the connection."

I thought maybe I could disable output on the Blackmagic Design Control Panel and that would allow vMix to take over to do it's thing, but there isn't even an option to disable it.

Our goal is to essentially use vMix for IMAG in a live setting with the program out on one projector then a different selectable input (using the Fullscreen tab) on a second display.


Any ideas? We're likely going to be switching to a Decklink Quad so we can have more than one SDI input into this thing and get a separate card for HDMI External output, but we want to make sure this setup works.

I think Decklink cards use the output port to put through the input signal. That is seems to be the case at least with Decklink Duo card.