MediaTrackSettings.frameRate

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MediaTrackSettings dictionary's frameRate property is a double-precision floating-point number indicating the frame rate, in frames per second, of the MediaStreamTrack as currently configured. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the MediaTrackConstraints.frameRate property you provided when calling either getUserMedia() or MediaStreamTrack.applyConstraints() .

If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.frameRate as returned by a call to MediaDevices.getSupportedConstraints() . However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.

var frameRate = MediaTrackSettings.frameRate;

A double-precision floating-point number indicating the current configuration of the track's frame rate, in frames per second.

规范	状态	注释
媒体捕获和流 The definition of 'frameRate' in that specification.	候选推荐	最初的规范。

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
`frameRate`	Chrome Yes	Edge ≤79	Firefox 36	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android 36	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes