Thank you for your answers.
I am actually from France. Version 8519 is no longer available for download. I tried the versions 8518, 8523 and 8527 and the images are still jerky âšī¸
I have connected several screens with different connectors (thunderbolt, USB-C, HDMI) to eliminate the possibility of a badly managed display. I also plugged in the Diversity stick directly or via a dock. Nothing works.
I am glad to see that EyeTV 4 works fine for EYEMISSELGATO. But there seem to be differences between an upgrade and a clean install. For example, I can't set the hibernate mode on my Mac Studio, while others who have upgraded can. I guess there is a subtle difference that prevents EyeTV 4 from working fine in my case.
For now, I give up. I hope Geniatech will fix this jerky image problem, or better yet, will offer a native ARM version.