Hyperion internal frame grabber

Hey there
I just moved from a RPI3 to 4
The System is up and running and hyperion is installed via hypercon.
They rainbow swirl starts when hyperion starts and via a app on my phone i can set the colors.
But when i start a movie i get no hyperion effect.
Seems like the internal grabber is not working and some times the HDMI connection drops for a few seconds.
When i stop hyperion this those not happen anymore .

I also looked to instal the NG version but the links in the guides don't work anymore and i github there seems to be no RPI version

Is there anybody here how has hyperion running on a RPI4 and how can tell me how they done it

Thanks