Thuộc tính HTML Audio / Video DOM audioTracks

Nhận số lượng bản âm thanh có sẵn:

var vid = document.getElementById("myVideo");
alert(vid.audioTracks.length);

Định nghĩa và Cách sử dụng

Thuộc tính audioTracks trả về một đối tượng AudioTrackList.

Đối tượng AudioTrackList đại diện cho các rãnh âm thanh có sẵn cho âm thanh / video.

Mỗi bản âm thanh có sẵn được đại diện bởi một Đối tượng AudioTrack.

Property
audioTracks	Not supported	11	Not supported	Not supported	Not supported

audio|video.audioTracks

Type	Description
AudioTrackList Object	Represents the available audio tracks for the audio/video. AudioTrackList Object: audioTracks.length - get the number of audio tracks available audioTracks.getTrackById(id) - get AudioTrack object by id audioTracks[index] - get AudioTrack object by index Note: The first available AudioTrack object is index 0
AudioTrack Object	Represents an audio track. AudioTrack Object Properties: id - get the id of the audio track kind - get the type 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 if the track is active (true\|false)

Type

Description

AudioTrackList Object

Represents the available audio tracks for the audio/video.

AudioTrackList Object:

Note: The first available AudioTrack object is index 0

AudioTrack Object

Represents an audio track.

AudioTrack Object Properties:

id - get the id of the audio track
kind - get the type 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 if the track is active (true|false)