OnFrameCaptured_RenderingThread never called inside my custom MediaCapture

I’m actually creating a custom MediaCapture (From the plugin Media Framework Utilities).
While everything seems to work, I cannot manage to find why the OnFrameCaptured_RenderingThread function is never called. Since I need this to get the frames, I’m blocked with a running plugin that can only show the result I want inside a small preview box in the editor.

Any idea what I might have done wrong? What am I missing?

The solution is that the MediaState is never set to Capturing. It needs to be done by the developer which creates the plugin.