PhotoCapabilities

在此页

特性
范例
规范
浏览器兼容性
相关话题

PhotoCapabilities 接口的 MediaStream 图像捕获 API provides available configuration options for an attached photographic device. A PhotoCapabilities object is retrieved by calling ImageCapture.getPhotoCapabilities() .

特性

PhotoCapabilities.redEyeReduction 只读: Returns one of "never" , "always" ，或 "controllable" 。 "controllable" value means the device's read-eye reduction is controllable by the user.
PhotoCapabilities.imageHeight 只读: 返回 MediaSettingsRange object indicating the image height range supported by the user agent.
PhotoCapabilities.imageWidth 只读: 返回 MediaSettingsRange object indicating the image width range supported by the user agent.
PhotoCapabilities.fillLightMode 只读: Returns an array of available fill light options. Options may include auto , off ，或 flash .

范例

The following example, extracted from Chrome's Image Capture / Photo Resolution Sample , uses the results from getPhotoCapabilities() to modify the size of an input range. This example also shows how the ImageCapture object is created using a MediaStreamTrack retrieved from a device's MediaStream .

const input = document.querySelector('input[type="range"]');
var imageCapture;
navigator.mediaDevices.getUserMedia({video: true})
.then(mediaStream => {
  document.querySelector('video').srcObject = mediaStream;
  const track = mediaStream.getVideoTracks()[0];
  imageCapture = new ImageCapture(track);
  return imageCapture.getPhotoCapabilities();
})
.then(photoCapabilities => {
  const settings = imageCapture.track.getSettings();
  input.min = photoCapabilities.imageWidth.min;
  input.max = photoCapabilities.imageWidth.max;
  input.step = photoCapabilities.imageWidth.step;
  return imageCapture.getPhotoSettings();
})
.then(photoSettings => {
  input.value = photoSettings.imageWidth;
})
.catch(error => console.log('Argh!', error.name || error));

规范

规范	状态	注释
MediaStream 图像捕获 The definition of 'PhotoCapabilities' 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
`PhotoCapabilities`	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
`fillLightMode`	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
`imageHeight`	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
`imageWidth`	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
`redEyeReduction`	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
兼容性未知 ?
实验。期望将来行为有所改变。

元数据

最后修改： Aug 11, 2020

PhotoCapabilities
特性

在此页

特性

范例

规范

浏览器兼容性

图例

相关话题