The HTMLMediaElement.defaultPlaybackRate property indicates the default playback rate for the media.


var dSpeed = video.defaultPlaybackRate;
audio.defaultPlaybackRate = 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. The value 0.0 is invalid and throws a NOT_SUPPORTED_ERR exception.


var obj = document.createElement('video');
console.log(obj.defaultPlaybackRate); // 1


Specification Status Comment
HTML Living Standard
The definition of 'HTMLMediaElement.defaultPlaybackRate' in that specification.
Living Standard No change from HTML5
The definition of 'HTMLMediaElement.defaultPlaybackRate' in that specification.
Recommendation Initial definition.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
defaultPlaybackRate property (Yes) (Yes) 20.0 (20.0) 9 ? ?
Feature Android Edge Firefox Mobile (Gecko) Firefox OS (Gecko) IE Mobile Opera Mobile Safari Mobile
defaultPlaybackRate property (Yes) (Yes) 20.0 (20.0) (Yes) ? ? ?

See also

Document Tags and Contributors

 Contributors to this page: erikadoyle, markg
 Last updated by: erikadoyle,