Failed to execute 'createObjectURL' on 'URL':

Question

I experienced the same error, when I passed raw data to createObjectURL:

window.URL.createObjectURL(data)

It has to be a Blob, File or MediaSource object, not data itself. This worked for me:

var binaryData = [];
binaryData.push(data);
window.URL.createObjectURL(new Blob(binaryData, {type: "application/zip"}))

Check also the MDN for more info: https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL

---

UPDATE

Back in the day we could also use createObjectURL() method with MediaStream objects. This use has been dropped by the specs and by browsers.
If you need to set a MediaStream as the source of an HTMLMediaElement just attach the MediaStream object directly to the srcObject property of the HTMLMediaElement e.g. <video> element.

const mediaStream = new MediaStream();
const video = document.getElementById('video-player');
video.srcObject = mediaStream;

However, if you need to work with MediaSource, Blob or File, you still have to create a blob:// URL with URL.createObjectURL() and assign it to HTMLMediaElement.src.

Read more details here: https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/srcObject

This error is caused because the function createObjectURL is deprecated for Google Chrome

I changed this:

video.src=vendorUrl.createObjectURL(stream);
video.play();

to this:

video.srcObject=stream;
video.play();

This worked for me.

My code was broken because I was using a deprecated technique. It used to be this:

video.src = window.URL.createObjectURL(localMediaStream);
video.play();

Then I replaced that with this:

video.srcObject = localMediaStream;
video.play();

That worked beautifully.

EDIT: Recently localMediaStream has been deprecated and replaced with MediaStream. The latest code looks like this:

video.srcObject = new MediaStream();

References:

1. Deprecated technique: https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
2. Modern deprecated technique: https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/srcObject
3. Modern technique: https://developer.mozilla.org/en-US/docs/Web/API/MediaStream

Video with fall back:

try {
  video.srcObject = mediaSource;
} catch (error) {
  video.src = URL.createObjectURL(mediaSource);
}
video.play();

From: https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/srcObject

I had the same error for the MediaStream. The solution is set a stream to the srcObject.

From the docs:

Important: If you still have code that relies on createObjectURL() to attach streams to media elements, you need to update your code to simply set srcObject to the MediaStream directly.