网站在线客服系统实时语音视频聊天实战开发，判断MediaStream对象是视频流还是音频流

当我们接收到音视频流MediaStream对象以后，我们需要知道这是视频还是音频

才能去以正确的标签展示，可以看下面的判断

console.log("call stream",remoteStream);

var videoTracks = remoteStream.getVideoTracks();

var audioTracks = remoteStream.getAudioTracks();

//视频流

if (videoTracks.length > 0) {

console.log("客服视频接待");

var remoteVideo = document.getElementById("remoteVideo");

remoteVideo.srcObject = remoteStream;

remoteVideo.play();

_this.peerjs.remoteVideoStream=remoteStream;

}else if (audioTracks.length > 0) {

//音频流

console.log("客服音频接待");

var remoteAudio = document.getElementById("remoteAudio");

remoteAudio.srcObject = remoteStream;

remoteAudio.play();

_this.peerjs.remoteAudioStream=remoteStream;

}

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