Blackmagic Input source not initializing

Hey there Devs,
I am getting the input through one of my DecLink card and it is showing in media bundle without any errors. my other card is outputting the current view-port.

As per the project and screen size I have to run the level in standalone game mode. At that time my others things work seamlessly but just the media bundle is not getting initialized in blueprints.

I followed the documentation and created a input source for blackmagic and called it in media player but it doesn’t save. so I even called in blueprints but it doesn’t play.

Help is appreciated as I am stuck on the last level of my project.

Regards.