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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

ImageCapture() 构造函数创建新 ImageCapture 对象。

句法

const imageCapture = new ImageCapture(videoTrack)
					

参数

videoTrack

MediaStreamTrack from which the still images will be taken. This can be any source, such as an incoming stream of a video conference, a playing movie, or the stream from a webcam.

返回值

新的 ImageCapture object which can be used to capture still frames from the specified video track.

范例

The following example shows how to use a call to MediaDevices.getUserMedia() 以检索 MediaStreamTrack needed by the ImageCapture() 构造函数。

 navigator.mediaDevices.getUserMedia({video: true})
  .then(mediaStream => {
    document.querySelector('video').srcObject = mediaStream
    const track = mediaStream.getVideoTracks()[0];
    imageCapture = new ImageCapture(track);
  })
  .catch(error => console.log(error));
					

规范

规范	状态	注释
MediaStream 图像捕获 The definition of 'ImageCapture' in that specification.	工作草案	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
ImageCapture() 构造函数	Chrome 59	Edge ≤79	Firefox ?	IE ?	Opera 46	Safari ?	WebView Android 59	Chrome Android 59	Firefox Android ?	Opera Android 43	Safari iOS ?	Samsung Internet Android 7.0

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

元数据

• 最后修改： Feb 11, 2020

相关话题

1. ImageCapture
2. 构造函数

   1. ImageCapture() constructor
3. 特性

   1. track
4. 方法

   1. getPhotoCapabilities()
   2. getPhotoSettings()
   3. grabFrame()
   4. takePhoto()
5. 继承：

   1. EventTarget