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Cost. SFUs don’t have to transcode the video, just pass buffers around and ensure both ends agree on the format. That is an enormously lighter process. Persona
by fidotron 3y ago
Cost. SFUs don’t have to transcode the video, just pass buffers around and ensure both ends agree on the format. That is an enormously lighter process.
Personally I think simulcast (sending multiple differently encoded streams) is almost always wrong for many Webrtc uses (especially mobile publishers) but in the OBS case it actually makes a lot more sense.
- EGreg 3y agoHow does WebRTC know what resolution to send? Or does it always send the original resolution?
- fidotron 3y agoThat all depends on how you set it up. Generally speaking a lot of WebRTC is about how the connection negotiates the parameters of the delivery of the different media, including codecs, resolution, etc. One track can be delivered over a connection in multiple different ways at once as well. If you want to know more you're probably best off going through the MDN docs about the WebRTC browser API and learning from that.