MediaStream.getTracks()
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()
** 方法会返回一个包含 track set
流中所有 MediaStreamTrack
对象的序列,序列内容与MediaStreamTrack.kind
无关。
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;
// Stop the stream after 5 seconds
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
BCD tables only load in the browser