MediaStreamTrack.getCapabilities() - Web API 接口参考 编辑

MediaStreamTrack 接口的 getCapabilities() 方法返回一个  MediaTrackCapabilities 对象，此对象表示每个可调节属性的值或者范围，该特性依赖于平台和user agent.

一旦你知道了浏览器的功能，你的脚本可以通过调用 applyConstraints() 来请求配置为匹配理想或可接受的设置。参考Capabilities and constraints in MediaStream API 以了解受限制属性的具体细节。

语法

var capabilities = MediaStreamTrack.getCapabilities();

参数

没有参数。

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

Specification	Status	Comment
Media Capture and Streams getConstraints()	Candidate Recommendation	Initial definition.

浏览器兼容性

BCD tables only load in the browser

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.