Django video streaming and Safari HTML5 canvas -

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I'm streaming smaller videos from the demo view: 

  def (request) : ['Content-type'] = 'video / mp3' response ['content-length'] = OS (file-name = settings.VIDEO_URL + extra_path wrapper = FileWrapper (file (file name, "RB")) response = HTPRPS.png .path.getsize (filename) return response   
 and the html code like this:

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