title: Use front and back (primary and secondary) camera simultaneously on iOS device
body: <p>I wanted to know if there is any functionality/app on iOS devices which allows you to capture videos simultaneously using front and back cameras showing the outputs in say a split screen. And then later allowing to merge both videos. </p>
  
  <p>Can this functionality be achieved through a user designed app or through a cydia tweak on jailbroken devices ? This question is simply out of curiosity, any relevant information would be helpful.</p>
  
  <p>Thanks.</p>