title: Android, Open Front and Back Cameras Simultaneously
body: <p>I am attempting to use 2 Surface Holder objects tied to 2 separate SurfaceViews.
  I am for the one set doing a Camera.Open(0) for the back camera and Camera.Open(1) for the front.
  I am able to get a perfect preview for whichever I call to open first, but am unable to open both Cameras at the same time, even though I am using separate SurfaceViews and SurfaceHolders for each Camera.</p>
  
  <p>Is it just impossible to do this under Android ?  I have seen a couple of post suggesting that it is either not possible, or that it is phone hardware dependent, but no concrete explanations as to why.</p>
  
  <p>Could somebody explain why Android does not appear to support this ? 
  If it is supported, could someone suggest the correct way of opening both Cameras at the same time ?</p>
  
  <p>I have also seen some suggestions that it should be possible to do using OpenCV.  If so, could someone please provide a link to an example or similar ? </p>
  
  <p>Thanks and Regards,</p>
  
  <p>Steed.</p>