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HTML 音频/视频 DOM defaultPlaybackRate 属性

❮ HTML 音频/视频 DOM 参考

示例

默认将视频设置为慢动作

let vid = document.getElementById("myVideo");
vid.defaultPlaybackRate = 0.5;
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定义和用法

defaultPlaybackRate 属性设置或返回音频/视频的默认播放速度。

设置此属性只会更改默认播放速度,而不会更改当前速度。要更改当前播放速度,请使用 playbackRate 属性。


浏览器支持

表中的数字指定完全支持该属性的第一个浏览器版本。

属性
defaultPlaybackRate 9.0 20.0 不支持

语法

返回 defaultPlaybackRate 属性

audio|video.defaultPlaybackRate

设置 defaultPlaybackRate 属性

audio|video.defaultPlaybackRate=playbackspeed

属性值

描述
playbackspeed 表示音频/视频的默认播放速度。
示例值
  • 1.0 是正常速度
  • 0.5 是半速(更慢)
  • 2.0 是双速(更快)
  • -1.0 是倒退,正常速度
  • -0.5 是倒退,半速

技术细节

返回值 数字,默认播放速度
默认值 1.0

❮ HTML 音频/视频 DOM 参考
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