I have a beginner question - Can WebRTC be used as an alternative to sending base64-encoded images to a backend server for image processing? Is this approach recommended?
The OpenAI API is a pretty high-profile example of this existing in the real world. You use it in their conversations interface when you want to include images in the conversation. Discord also uses it for attachments https://discord.com/developers/docs/reference#image-data. More generally it's when you want to send image data as part of a larger JSON blob.
https://github.com/pion/webrtc/tree/master/examples/save-to-... here is an example of a server that does what you need on the backend