title: Playing still images as a video in AVQueuePlayer
body: <p>I want to play a sequence of videos and images (like Snapchat does). By playing an image I mean having it show on the screen for a certain amount of time. I am using <code>AVFoundation</code> for media capture and playback, and I am using <strong>swift</strong> to develop this application. 
  I have <code>.mp4</code> videos and <code>.jpg</code> images, and I was trying to think of the easiest way to convert the <code>.jpg</code> images to videos such that I could simply add everything to the array of assets that will be passed in as a parameter to the <code>AVQueuePlayer</code> initializer. </p>
  
  <p>Does anybody have any insight on how to do this?</p>