Scripts Embedded in OBS

OBS has embedded Python and Lua interpreters.

Python/Lua Scripting
OBS Studio Python Scripting Cheatsheet
Getting Started With OBS Scripting
OBS-Python – higher-level API

Example Scripts:

How do I run python-osc inside OBS as script?
ObsSoundPlugin

OBS-Websocket

Another way to extend and control OBS is to install the OBS-Websocket module so that a your script running outside of OBS can send it queries and commands.

OBS-Websocket plugin
OBS-Websocket plugin Protocol
OBS-Websocket-Py client protocol 4.0 client
simpleobsws protocol 5.0 client