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

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 43Edge Full support YesFirefox Full support 20IE Full support 9Opera ? Safari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 20Opera Android ? Safari iOS ? Samsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

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