title: AVFoundation & Video Effects
body: <p>I'm trying myself on some video-editing, I got sequencing and mixing video/audio together all working properly, even some basic slow-mo! :)
  Now I want to integrate video filters, not only to the layer itself (elsewise I would have use AVPlayerItemVideoOutput in company with an CIFilter) but also in the final video file that gets exported.
  Therefore I'm currently looking into "rendering" the CIFilter I mentioned above into the final video while still keeping very precise control over timing using CMTime.</p>
  
  <p>Any suggestions?</p>