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webrtc simulcast example
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document.getElementById("btn").onclick = async () => { | |
await run(); | |
} | |
async function run() { | |
let stream = await navigator.mediaDevices.getUserMedia({ video: true, audio: false }); | |
/* sender */ | |
let sender = new RTCPeerConnection(); | |
sender.onicecandidate = e => receiver.addIceCandidate(e.candidate); | |
sender.addTransceiver(stream.getVideoTracks()[0], { | |
direction: "sendonly", | |
streams: [stream], | |
sendEncodings: [ | |
{ rid: "h", maxBitrate: 1200 * 1024 }, | |
{ rid: "m", maxBitrate: 600 * 1024, scaleResolutionDownBy: 2 }, | |
{ rid: "l", maxBitrate: 300 * 1024, scaleResolutionDownBy: 4 } | |
] | |
}); | |
/* receiver */ | |
let receiver = new RTCPeerConnection(); | |
receiver.onicecandidate = e => sender.addIceCandidate(e.candidate); | |
receiver.ontrack = e => document.getElementById("video").srcObject = e.streams[0]; | |
let offer = await sender.createOffer(); | |
await sender.setLocalDescription(offer); | |
await receiver.setRemoteDescription(offer); | |
let answer = await receiver.createAnswer(); | |
await receiver.setLocalDescription(answer); | |
await sender.setRemoteDescription(answer); | |
} |
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