The getAudioTracks()
method of the MediaStream
interface returns a sequence that represents all the MediaStreamTrack
objects in this stream's track set
where MediaStreamTrack.kind
is audio
.
Syntax
var mediaStreamTracks = mediaStream.getAudioTracks()
Parameters
None.
Return value
An array of MediaStreamTrack
objects, one for each audio track contained in the stream. Audio tracks are those tracks whose kind
property is audio
. The array is empty if the stream contains no audio tracks.
Note: The order of the returned tracks is not defined by the specification and may, in fact, change from one call to getAudioTracks()
to the next.
Early versions of this API included a special AudioStreamTrack
interface which was used as the type for each entry in the list of audio streams; however, this has since been merged into the main MediaStreamTrack
interface.
Example
This example gets a webcam's audio and video in a stream using getUserMedia()
, attaches the stream to a <video>
element, then sets a timer that, upon expiring, will stop the first audio track found on the stream.
navigator.mediaDevices.getUserMedia({audio: true, video: true}) .then(mediaStream => { document.querySelector('video').srcObject = mediaStream; // Stop the audio stream after 5 seconds setTimeout(() => { const tracks = mediaStream.getAudioTracks() tracks[0].stop() }, 5000) })
Specifications
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The definition of 'getAudioTracks()' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
getAudioTracks | Chrome Full support 26 | Edge Full support 12 | Firefox
Full support
22
| IE No support No | Opera Full support Yes | Safari Full support Yes | WebView Android Full support 37 | Chrome Android Full support 26 | Firefox Android
Full support
22
| Opera Android No support No | Safari iOS Full support Yes | Samsung Internet Android Full support 1.5 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.