XSplit's VCam can do background removal without chroma-key. It's reasonably good, and emits a virtual webcam that VC clients or OBS can use as an input. Think it's 40 USD for a lifetime license. Has a bit of ghosting when you move quickly.
Yes. OBS offers it. Teams and Zoom have guesswork-based imitations.
And where can I find the OBS implementation of this work?
I thought GP was asking for an implementation of background removal without a green screen.
That's definitely my impression, and to my knowledge, OBS doesn't offer it. I'd be thrilled to learn otherwise.
Indeed. I'm fairly sure it's not in OBS. Which is why I asked for a link to where it was implemented. Surprisingly I didn't receive one...
The Zoom guesswork-based imitation is pretty good, and it seems to be optimized for a single person's movement. It gets confused when there are more actors like a child or dog entering from stage left.
OBS only offers a green screen plugin, and the teams/zoom versions are nowhere even close to this good.