HTML-Audio/Video-DOM -videoTracks- Eigenschaft

Rufen Sie die Anzahl der verfügbaren Videospuren ab:

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

Definition und Verwendung

Die videoTracks-Eigenschaft gibt ein VideoTrackList-Objekt zurück.

Das VideoTrackList-Objekt stellt die verfügbaren Videospuren für das Video dar.

Jede verfügbare Videospur wird durch ein VideoTrack-Objekt repräsentiert.

Property
videoTracks	Not supported	Not supported	Not supported	Not supported	Not supported

video.videoTracks

Type	Description
VideoTrackList Object	Represents the available video tracks for the video. VideoTrackList Object: videoTracks.length - get the number of video tracks available in the video videoTracks.getTrackById(id) - get VideoTrack object by id videoTracks[index] - get VideoTrack object by index videoTracks.selectedIndex - get the index of the current VideoTrack object Note: The first available VideoTrack object is index 0
VideoTrack Object	Represents a video track. VideoTrack Object Properties: id - get the id of the video track kind - get the type of the video track (can be: "alternative", "captions", "main", "sign", "subtitles", "commentary", or "" (empty string)) label - get the label of the video track language - get the language of the video track selected - get or set if the track is active (true\|false)

Type

Description

VideoTrackList Object

Represents the available video tracks for the video.

VideoTrackList Object:

Note: The first available VideoTrack object is index 0

VideoTrack Object

Represents a video track.

VideoTrack Object Properties:

id - get the id of the video track
kind - get the type of the video track (can be: "alternative", "captions", "main", "sign", "subtitles", "commentary", or "" (empty string))
label - get the label of the video track
language - get the language of the video track
selected - get or set if the track is active (true|false)