HTML Reference Manual

HTML Tag Reference

HTML Audio/Video DOM audioTracks attribute

The AudioTrack interface represents a single track from an HTML media element, <audio> or <video>. The most common use of the AudioTrack object is to switch its enabled attribute to mute and unmute the track.

　HTML Audio/Video DOM Reference Manual

Online example

Get the number of available audio tracks:

Example

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>HTML Audio/Video audioTracks attribute usage-Basic tutorial(oldtoolbag.com)</<title>
</<head>
<body>
<button onclick="getAudioTracks()" type="button">Get the number of available audio tracks: </button>
<br>　
<video id="video1" controls="controls">
　　<source src="movie.mp4" type="video/mp4">
　　<source src="movie.ogg" type="video/ogg">
　　Your browser does not support HTML5　video tag.
</video>
<script>
myVid=document.getElementById("video1");
function getAudioTracks()
{　
　　alert(myVid.audioTracks.length);
}　
</script>　
</body>
</html>

Test to see ‹/›

Definition and usage

The audioTracks property returns an AudioTrackList object.
The AudioTrackList object represents audio/The available audio tracks of the video.
Each available track is represented by an AudioTrack object.

Browser compatibility

IEFirefoxOperaChromeSafari

All mainstream browsers do not support the audioTracks property.

Syntax

audio|video.audioTracks

Return value

Type	Description
AudioTrackList object	Represents audio/The available audio tracks of the video. AudioTrackList object: audioTracks.length - Get the number of available audio tracks audioTracks.getTrackById(id) - Get the AudioTrack object by id audioTracks[index] - Get the AudioTrack object by index Note:The first available AudioTrack object'sIndexis 0.
AudioTrack object	Represents the audio track. Properties of AudioTrack object: id - Get the id of the audio track kind - Get the kind of the audio track (can be "alternative", "description", "main", "translation", "commentary" or "" (empty string)) label - Get the label of the audio track language - Get the language of the audio track enabled - Get or set whether the audio track is active (true\|false)

　HTML Audio/Video DOM Reference Manual

HTML: <template> tag