title: Alternatives to deprecated AVCaptureConnection frame-duration properties?
body: <p>According to <a href="https://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVCaptureConnection_Class/DeprecationAppendix/AppendixADeprecatedAPI.html" rel="noreferrer">this document</a> the properties and methods relating to video-frame maximum and minimum duration: </p>
  
  <ul>
  <li><code>supportsVideoMaxFrameDuration</code></li>
  <li><code>supportsVideoMinFrameDuration</code></li>
  <li><code>videoMaxFrameDuration</code></li>
  <li><code>videoMinFrameDuration</code></li>
  </ul>
  
  <p>have all been deprecated. Are there alternatives? </p>