Mobile & Straming Pc

[Required]

Hi
I wan to Stream from a conference some contend. Mostly 2-3 Cams and 1x Laptop who the presenter shows there presentation.
I have no clue witch Software support Azure Server Contend Switching I often get different answer from MS.

Lets say some Matrox Card: https://www.matrox.com/graphics/en/products/video-wall/mura_ipx_series/4k-capture-ip-encoder-decoder-cards/lineup/ with 4x Input.

The next problem I need to transport the Pc in Public Transport and all Cube Design have just 2 PCI-E Ports and no Internal Power Connector.

What I need is:
2x Slots for a Dual Slot Graphic Card

1x PCI-E for an Input Card

1x PCI-E Slot for Raid or maybe SSD

Like: "Don't search for SCTE-35. what you are looking for is an encoder that supports switching at the source encoder side."

now clue how to find that...

[Mephi00]

Maybe find sonething mAtx or miniItx with some beasty processor with an igpu, so you should always have enough space in the case