The HTMLMediaElement.playbackRate property sets the rate at which the media is being played back. This is used to implement user controls for fast forward, slow motion, and so forth. The normal playback rate is multiplied by this value to obtain the current rate, so a value of 1.0 indicates normal speed.

If playbackRate is negative, the media is not played backwards.

The audio is muted when the fast forward or slow motion is outside a useful range (for example, Gecko mutes the sound outside the range 0.25 to 4.0).

The pitch of the audio is corrected by default and is the same for every speed. Some browsers implement the non-standard HTMLMediaElement.preservesPitch This API has not been standardized. property to control this.


// video
video.playbackRate = 1.5;
// audio
audio.playbackRate = 1.0;


A double. 1.0 is "normal speed," values lower than 1.0 make the media play slower than normal, higher values make it play faster. (Default: 1.0)


var obj = document.createElement('video');
console.log(obj.playbackRate); // Expected Output: 1


Specification Status Comment
HTML Living Standard
The definition of 'HTMLMediaElement.playbackRate' in that specification.
Living Standard
The definition of 'HTMLMediaElement.playbackRate' in that specification.

Browser compatibility

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See also