在此页

• 方法
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

MediaCapabilities 接口在 媒体能力 API provides information about the decoding abilities of the device, system and browser. The API can be used to query the browser about the decoding abilities of the device based on codecs, profile, resolution, and bitrates. The information can be used to serve optimal media streams to the user and determine if playback should be smooth and power efficient.

The information is accessed through the mediaCapabilities 特性为 Navigator 接口。

方法

MediaCapabilities.encodingInfo()

When passed a valid media configuration, it returns a promise with information as to whether the media type is supported, and whether encoding such media would be smooth and power efficient .

MediaCapabilities.decodingInfo()

When passed a valid media configuration, it returns a promise with information as to whether the media type is supported, and whether decoding such media would be smooth and power efficient .

规范

规范	状态	注释
Media Capabilities The definition of 'MediaCapabilities' in that specification.	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
MediaCapabilities	Chrome 66	Edge ≤79	Firefox 63	IE ?	Opera 55	Safari ?	WebView Android 66	Chrome Android 66	Firefox Android 63	Opera Android 48	Safari iOS ?	Samsung Internet Android 9.0
decodingInfo	Chrome 66	Edge ≤79	Firefox 63	IE ?	Opera 55	Safari ?	WebView Android 66	Chrome Android 66	Firefox Android 63	Opera Android 48	Safari iOS ?	Samsung Internet Android 9.0
encodingInfo	Chrome 67 Disabled 67 Disabled Disabled From version 67: this feature is behind the chrome://flags/#enable-experimental-web-platform-features preference (needs to be set to enabled ). To change preferences in Chrome, visit chrome://flags.	Edge ≤79 Disabled ≤79 Disabled Disabled From version ≤79: this feature is behind the chrome://flags/#enable-experimental-web-platform-features preference (needs to be set to enabled ).	Firefox 63	IE ?	Opera ?	Safari ?	WebView Android No	Chrome Android 67 Disabled 67 Disabled Disabled From version 67: this feature is behind the chrome://flags/#enable-experimental-web-platform-features preference (needs to be set to enabled ). To change preferences in Chrome, visit chrome://flags.	Firefox Android 63	Opera Android ?	Safari iOS ?	Samsung Internet Android No

图例

完整支持

完整支持

不支持

不支持

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。

用户必须明确启用此特征。

用户必须明确启用此特征。

另请参阅

• HTMLMediaElement 的方法 canPlayType()
• MediaSource 的方法 isTypeSupported()
• Navigator interface

元数据

• 最后修改： Mar 18, 2019

相关话题

1. 媒体能力 API
2. MediaCapabilities
3. 方法

   1. decodingInfo()
   2. encodingInfo()
4. Related pages for Media Capabilities API

   1. MediaCapabilitiesInfo
   2. Screen
   3. ScreenLuminance
   4. mediaCapabilities.decodingInfo()
   5. mediaCapabilities.encodingInfo()