音视频播放

捕获音视频媒体流(返回promise)

navigator.mediaDevices.getUserMedia({
audio: true,
video: {
width: {min: 1024, ideal: 1280, max: 1920},
height: {min: 576, ideal: 720, max: 1080},
frameRate: {max: 30} // 帧率
}
})

播放流媒体

var video = document.querySelector('video')
video.srcObject = stream
video.onloadedmetadata = function(e) {
    video.play()
}