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.
A MediaStream, MediaSource, Blob, or File object (though see the compatibility table for what is actually supported).
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.
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;
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 {
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');
if ('srcObject' in video) {
try {
video.srcObject = mediaSource;
} catch (err) {
if (err.name != "TypeError") {
throw err;
}
video.src = URL.createObjectURL(mediaSource);
}
} else {
video.src = URL.createObjectURL(mediaSource);
}
