HTMLMediaElement: playbackRate property

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.

A negative playbackRate value indicates that the media should be played backwards, but support for this is not yet widespread. (See browser compatibility for details.)

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. You can disable pitch correction using the HTMLMediaElement.preservesPitch property.

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