title: GPUImageMovie pause while applying filter
body: <p>I am using Brad Larson's great library <a href="https://github.com/BradLarson/GPUImage" rel="nofollow">GPUImage</a> for my application. Currently I am stuck with an issue. My application captures 10 second videos and after that allows <code>filter</code> applying. While applying <code>filters</code> in <code>GPUImageMovie</code>, I am not able to pause the play and apply new <code>filter</code> so that video will play continuously without starting from the beginning.</p>
  
  <p>I saw an open github issue <a href="https://github.com/BradLarson/GPUImage/issues/1247" rel="nofollow">here</a>. If anyone faced similar issue and found a solution, please post your answers. Thanks in advance.</p>