- Operate a camera (webcam)
- Relay the video over the network
Thinking about this, I'd like to do as little work as possible on the video. I don't know much about encoding/decoding, but I do know it's CPU intensive (something I don't have much of on the Pi).
Therefore I'd like to do minimal work but be able to kick a video stream out over the network.
It made me think of WebRTC, a web-standard peer-to-peer media transfer mechanism. Used in several places include Google Hangouts. I didn't know much about it so I researched it.
In short, a WebRTC endpoint (like a web browser) will want to establish a peer-to-peer connection with another endpoint. This entails:
- Discovering another endpoint (not part of the standard, you implement this)
- Exchanging details about media capabilities, and network / NAT details (details acquired by API, but still up to you to implement the transfer.
- Attempt direct-connection (API handles this, but you need to provide STUN server details)
This seems promising on the Pi side if there is a non-browser implementation. And there is.
Hunting around there appears to be several mentions of WebRTC and Python and Pi, including OpenWebRTC, and others.
However, the most successful path I could find online appeared to be message boards discussing the UV4L (Userspace Video 4 Linux) implementation of WebRTC and interface via a WebServer.
Another post will include detail on attempts to set up and use.
Resources about WebRTC:
Resources about UV4L: