title: python GTK container for mjpeg stream
body: <p>I have an mjpeg stream from a web-cam and would like to display it in an application written in python using pygtk. 
  The stream is a string of bytes from the driver.
  What widget would be best for displaying this and would I need to do some intermediate conversion before putting it in the widget? Should I write my own widget to do this? </p>