livego VS go-gst

For streaming video content your options would be HLS or WebRTC, maybe look into these gwuhaolin/livego and pion/webrtc.

So a good place to begin - I tried googling this but there is a lot of noise in the google results since I am lacking domain keywords, what is it called when / what libraries can I use for receiving video from something like OBS? The one useful result I have so far is livego, my only concern being that everything is handled so I have no control over the delay/buffer. There is 1 github issue about it that was asked and then closed without an answer. I don't see it in the configs either. Also unsure if I would be able to target twitch as the upload target.

Trust me, I've tried this for work. Most providers force you to use their cloud to access HLS, you can technically run a converter yourself for a hobby project: https://github.com/gwuhaolin/livego

you might take a look into this: https://github.com/gwuhaolin/livego

I don't know how low level you want to go, but assuming you don't want to re-implement video codecs then GStreamer is probably a good place to start, it allows you to create modular video pipelines and it has Go bindings (although I've not personally used them).

For the latter I have gstreamer bindings here https://github.com/tinyzimmer/go-gst , but you could potentially also implement yourself with other libraries tuned to the purpose.

I noticed you have some gstreamer examples which is awesome! In case you are interested, I maintain bindings also (and the app libraries are included) if you wanted to remove some of that internal boilerplate :).

If CGO isn't off the table, gstreamer can do some interesting stuff with the app library. I have bindings here. This example plays with "dynamically" producing image frames.