如何获得第二个屏幕共享流显示

Question

我正在使用 socket.io 和 peer js，试图让两个人像在视频通话中一样共享屏幕。我可以显示初始视频，但不能显示新用户。我想我正在以正确的方式将流传递回服务器。任何见解将不胜感激。

const socket = io('/')
const myPeer = new Peer(undefined, {
    host: '/',
    port: '3001'
})

const videoGrid = document.getElementById('video-grid')



const myVideo = document.createElement('video')
myVideo.muted = true


navigator.mediaDevices.getDisplayMedia().then(stream => {



    addVideoStream(myVideo, stream)


    myPeer.on('call', call => {
        call.answer(stream)
    })



    socket.on('user-connected', userId => {
        console.log(stream)
        connectToNewUser(userId, stream)

    })

});

myPeer.on('open', id => {

    socket.emit('join-room', ROOM_ID, id)

})






function connectToNewUser(userId, stream) {

    const call = myPeer.call(userId, stream)
    const video = document.createElement('video')
    call.on('stream', userVideoStream => {
        addVideoStream(video,userVideoStream)
        console.log(userVideoStream)
    })

    call.on('close', () => {
        video.remove()
    })

}


function addVideoStream(video, stream) {

    video.srcObject = stream
    video.addEventListener('loadedmetadata', () => {
        video.play()
    })
    videoGrid.append(video)
}```