Thanks for the answer. As Gunther has told me a lot about your setup i already though about contacting somebody from the Fanta crew ;-)

I managed to make it work with a Blackmagic SDI Card. In SD though and pretty slow. We will give the Blackmagic Intensity Card a dry today. Some QC Forums mention this one to work nicely with Quartz.

If that will not work i will go for the AJA Card. Do you have any exprience on how the Catalyst will be able to use more then one of the inputs in the AjA Card? Will they show up as single input sources for catalyst? Or do i need to pre-select one if the inputs in the System Preferences which will then handle the rest with Catalyst and make it see only one source?

Thanks
Thomas