HTMLMediaElement.srcObject
The srcObject
property of the
HTMLMediaElement
interface sets or returns the object which serves as
the source of the media associated with the HTMLMediaElement
.
The object can be a MediaStream
, a MediaSource
, a
Blob
, or a File
(which inherits from Blob
).
Note: As of March 2020, only Safari supports setting objects other
than MediaStream
. Until other browsers catch up, for
MediaSource
, Blob
and File
, consider falling
back to creating a URL with URL.createObjectURL()
and assign it to
HTMLMediaElement.src
. See below for an example.
Value
A MediaStream
, MediaSource
, Blob
, or
File
object (though see the compatibility table for what is actually
supported).
Usage notes
Older versions of the Media Source specification required using
createObjectURL()
to create an object URL then
setting src
to that URL. Now you can just set
srcObject
to the MediaStream
directly.
Examples
Basic example
In this example, a MediaStream
from a camera is assigned to a
newly-created <video>
element.
const mediaStream = await navigator.mediaDevices.getUserMedia({video: true});
const video = document.createElement('video');
video.srcObject = mediaStream;
In this example, a new MediaSource
is assigned to a newly-created
<video>
element.
const mediaSource = new MediaSource();
const video = document.createElement('video');
video.srcObject = mediaSource;
Supporting fallback to the src property
The examples below support older browser versions that require you to create an object
URL and assign it to src
if srcObject
isn't supported.
First, a MediaStream
from a camera is assigned to a newly-created
<video>
element, with fallback for older browsers.
const mediaStream = await navigator.mediaDevices.getUserMedia({video: true});
const video = document.createElement('video');
if ('srcObject' in video) {
video.srcObject = mediaStream;
} else {
// Avoid using this in new browsers, as it is going away.
video.src = URL.createObjectURL(mediaStream);
}
Second, a new MediaSource
is assigned to a newly-created
<video>
element, with fallback for older browsers and browsers that
don't yet support assignment of MediaSource
directly.
const mediaSource = new MediaSource();
const video = document.createElement('video');
// Older browsers may not have srcObject
if ('srcObject' in video) {
try {
video.srcObject = mediaSource;
} catch (err) {
if (err.name != "TypeError") {
throw err;
}
// Even if they do, they may only support MediaStream
video.src = URL.createObjectURL(mediaSource);
}
} else {
video.src = URL.createObjectURL(mediaSource);
}
Specifications
Specification |
---|
HTML Standard # dom-media-srcobject-dev |
Browser compatibility
BCD tables only load in the browser