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• 句法
• 规范
• 浏览器兼容性
• 相关话题

getCapabilities() 方法在 MediaStreamTrack interface returns a MediaTrackCapabilities object which specifies the values or range of values which each constrainable property, based upon the platform and 用户代理 .

Once you know what the browser's capabilities are, your script can use applyConstraints() to ask for the track to be configured to match ideal or acceptable settings. See Capabilities, constraints, and settings for details on how to work with constrainable properties.

句法

const capabilities = track.getCapabilities()
					

返回值

A MediaTrackCapabilities object which specifies the value or range of values which are supported for each of the user agent's supported constrainable properties.

规范

规范	状态	注释
媒体捕获和流 The definition of 'getCapabilities()' in that specification.	候选推荐	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
getCapabilities	Chrome 66	Edge 12	Firefox No	IE No	Opera 53	Safari Yes	WebView Android 66	Chrome Android 66	Firefox Android No	Opera Android 47	Safari iOS Yes	Samsung Internet Android 9.0

图例

完整支持

完整支持

不支持

不支持

元数据

• 最后修改： Feb 19, 2020

相关话题

1. Media Streams API
2. MediaStreamTrack
3. 特性

   1. enabled
   2. id
   3. kind
   4. label
   5. muted
   6. onended
   7. onmute
   8. onoverconstrained
   9. onunmute
   10. readyState
   11. remote
4. 方法

   1. applyConstraints()
   2. clone()
   3. getCapabilities()
   4. getConstraints()
   5. getSettings()
   6. stop()
5. 事件

   1. ended
   2. mute
   3. unmute
6. Related pages for Media Capture and Streams

   1. AudioStreamTrack
   2. BlobEvent
   3. CanvasCaptureMediaStream
   4. ConstrainBoolean
   5. ConstrainDOMString
   6. ConstrainDouble
   7. ConstrainLong
   8. DoubleRange
   9. HTMLCanvasElement.captureStream()
   10. LongRange
   11. MediaDevices
   12. MediaStream
   13. MediaStreamTrackEvent
   14. MediaTrackCapabilities
   15. MediaTrackConstraints
   16. MediaTrackSettings
   17. MediaTrackSupportedConstraints
   18. Navigator.mediaDevices
   19. NavigatorUserMedia
   20. NavigatorUserMediaError
   21. VideoStreamTrack
   22. navigator.mediaDevices.getUserMedia()