canvas.toDataURL() Security Error The operation is insecure

Question

When I am trying to get a screenshot and save it as PNG before uploading video to server, I am having the following problem

Answer 1

In docs toDataURL("data:image/png;") apparently not documented:

• https://developer.mozilla.org/pt-BR/docs/Web/API/HTMLCanvasElement
• http://msdn.microsoft.com/en-us/library/ie/ff975241%28v=vs.85%29.aspx

Try replace .toDataURL("data:image/png;"); by .toDataURL("image/png");