Hi,
I was thinking about making a compact open source stm32h747 board with features similar to Portenta and giga r1 wifi. I ended up deciding on these parts, that would allow for a hdmi video input on one usb c, while idmi video output for the other one, both using mini. For now I have a flowchart like this, but creating the scheme, layout, and firmware will all be quite difficult, and so if anyone wants to join this project, or give any advice, would be appreciated.
The amount of pins that can be used, as shown in top middle is 24 as of now.