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HTML Audio / Video DOM playbackRate property

HTML audio / video Tag Reference HTML Audio / Video DOM Reference

Examples

The video is set to slow:

myVid=document.getElementById("video1");
myVid.playbackRate=0.5;

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Definition and Usage

playbackRate property sets or returns the current playback speed of audio / video.

Browser Support

Internet ExplorerFirefoxOperaGoogle ChromeSafari

All major browsers support playbackRate property.

Note: 9 and earlier versions of Internet Explorer does not support playbackRate property.

grammar

Setting playbackRate properties:

audio|video .playbackRate= playbackspeed

Back playbackRate properties:

audio|video .playbackRate

Property Value

值 描述
playbackspeed 指示音频/视频的当前播放速度。
例值：
  • 1.0 正常速度
  • 0.5 半速（更慢）
  • 2.0 倍速（更快）
  • -1.0 向后，正常速度
  • -0.5 向后，半速

technical details

返回值： 数字值，当前播放速度
默认值： 1.0

HTML audio / video Tag Reference HTML Audio / Video DOM Reference