Python code and instructions on using gphoto2 to programmatically control Sony A7R3 camera
Currently following along this tutorial: https://www.crackedthecode.co/how-to-use-your-dslr-as-a-webcam-in-linux/
Sony Camera also has to be set:
USB Connection
toPC Remote
in Menu:Setup4
USB Power Supply
toOn
PC Remote Settings
:PC+Camera
(I think this simply allows on-camera control during remote session)