Web/API/MediaTrackSettings/frameRate

The 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.

Syntax

var frameRate = MediaTrackSettings.frameRate;

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

Specification	Status	Comment
Media Capture and StreamsThe definition of 'frameRate' in that specification.	Candidate Recommendation	Initial specification.

	Desktop						Mobile
	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 Full support Yes	Edge Full support ≤79	Firefox Full support 36	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 36	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support Yes