Attempting to render a Composition (Virtual Production)

I am delving into the world of virtual production and am running into issues when it comes to capturing what I have setup. In UE I have a beach scene from the market place as my background. I created a comp that has a CG element and a media plate. The CG element is the beach scene and the media plate references a media player that is grabbing a SDI feed which is pointed at a green screen. I have a decent key going and I have the virtual camera tracked using a vive HTC tracker. When I watch my comp in the viewport things look good and I want to be able to capture that feed which is combining the CG and the SDI feed. I have tried using the sequence recorder and the take recorder and neither seems to be grabbing the SDI feed. Any pointers?