i also think about how to use my gopro as live input...
i think you need some kind of input card / externat recorder
(blackmagic intensiti / BM recorder) so you can transform your gopro signal.
if there is another way (cheaper) of doing it i also would be happy to know it.
It is possible to "stream" your gopro via the Wlan prewie option but you will have ~3 sec delay.
Laptop: XMG P507 // Intel i7-5500 / GTX-1060 / 1tb SSD / 32gb RAM // Lemur / BirdDog Studio NDI
~self employed AV technician / Schu.VT|a|posteo.de~