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NotReadableError: Failed to allocate video stream

I get this error in Firefox 51 when I try to execute the following code, and when I select my camera for a laptop:

navigator.getMedia = (navigator.getUserMedia ||
  navigator.webkitGetUserMedia ||
  navigator.mediaDevices.getUserMedia ||
  navigator.msGetUserMedia);

navigator.getMedia({
    video: true,
    audio: false
  },
  function(stream) {
    if (navigator.mozGetUserMedia) {
      video.mozSrcObject = stream;
    } else {
      var vendorURL = window.URL || window.webkitURL;
      video.src = vendorURL.createObjectURL(stream);
    }
    video.play();
  },
  function(err) {
    console.log("An error occured! " + err);
  }
);

Mistake:

NotReadableError: Failed to allocate videosource

Can someone clarify what this means? Is my webcam broken? Yesterday I used it with a script without any problems. It does not stand out for another application.

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5 answers

NotReadableError- this is a bug that complies with the specification, NotReadableErrorFirefox, when access to the webcam is allowed but not possible.

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