如何确定 webrtc 媒体流只有音频? [英] How to determine a webrtc mediastream only has audio?

问题描述

当我收到对方的 onaddstream 事件时，如何确定 MediaStream 只有音频没有视频?

When I receive an onaddstream event from the other side, how can I determine the MediaStream only has audio, no video?

换句话说，我能知道一个 MediaStream 对象只有音频没有视频吗?

In other words, can I know a MediaStream object only has audio, no video?

推荐答案

peer.onaddstream = function (event) {
    var stream = event.stream;

    if (stream.getAudioTracks().length) alert('Peer has audio stream.');
    if (stream.getVideoTracks().length) alert('Peer has video stream.');
};

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