No Video Feed into QGC - Problem - Linux/Ubuntu OS

I have recently started using QGC and have everything working nicely except the video feed from my main camera which is gimbal mounted.

I am running a native Linux / Ubuntu environment. Video Source is set to UDP video stream @ 5600. The gimbal control works perfectly.

The video feed works flawlessly using the Tower App and Mission Planner.

I’m sure it is a simple configuration error. Could someone point me in the right direction, please?

Are you using the newest versions of QGC?