title: How to merge videos captured with avcapturesession?
body: <p>i have captured videos by following Method:
  "<code>[movieFileOutput startRecordingToOutputFileURL:outputFileURL recordingDelegate:self];</code>".</p>
  
  <p>i have stored this "<code>outputFileURL</code>" in an <code>NSMutableArray</code>. </p>
  
  <p>and i get "<code>outputFileURL</code>" is like this:</p>
  
  <pre><code>"file:///var/mobile/Containers/Data/Application/CB052F49-E9CA-4588-9661-BE8396C96AA3/Documents/output_2016-07-30_10-37-47.mov"
  </code></pre>
  
  <p>Now I want to merge these videos stored in <code>NSMutableArray</code>..</p>