MediaStream：getTracks() 方法

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2017.

MediaStream 接口的 getTracks() 方法返回一个包含当前媒体流的轨道集合中所有 MediaStreamTrack 对象（不论其 MediaStreamTrack.kind 是什么）的序列。

语法

js
getTracks()

参数

无。

返回值

MediaStreamTrack 对象的数组。

示例

js
navigator.mediaDevices
  .getUserMedia({ audio: false, video: true })
  .then((mediaStream) => {
    document.querySelector("video").srcObject = mediaStream;
    // 在 5 秒后停止媒体流
    setTimeout(() => {
      const tracks = mediaStream.getTracks();
      tracks[0].stop();
    }, 5000);
  });

规范

Specification
Media Capture and Streams
# dom-mediastream-gettracks

浏览器兼容性