MediaStreamTrack: stop() method
The MediaStreamTrack.stop()
method stops the track.
Syntax
js
stop()
Parameters
None.
Return value
None (undefined
).
Description
Calling stop()
tells the user agent that the track's
source—whatever that source may be, including files, network streams, or a local camera
or microphone—is no longer needed by the MediaStreamTrack
. Since multiple
tracks may use the same source (for example, if two tabs are using the device's
microphone), the source itself isn't necessarily immediately stopped. It is instead
disassociated from the track and the track object is stopped. Once no media tracks are
using the source, the source may actually be completely stopped.
Immediately after calling stop()
, the
readyState
property is set to
ended
. Note that the ended
event will not be fired in this situation.
Examples
Stopping a video stream
In this example, we see a function which stops a streamed video by calling
stop()
on every track on a given <video>
.
js
function stopStreamedVideo(videoElem) {
const stream = videoElem.srcObject;
const tracks = stream.getTracks();
tracks.forEach((track) => {
track.stop();
});
videoElem.srcObject = null;
}
This works by obtaining the video element's stream from its
srcObject
property. Then the stream's track
list is obtained by calling its getTracks()
method. From there, all that remains to do is to iterate over the track list using
forEach()
and calling each track's stop()
method.
Finally, srcObject
is set to null
to sever the link to the
MediaStream
object so it can be released.
Specifications
Specification |
---|
Media Capture and Streams # dom-mediastreamtrack-stop |
Browser compatibility
BCD tables only load in the browser
See also
MediaStreamTrack
, the interface it belongs to.MediaStreamTrack.readyState
ended