title: iOS, FFmpeg render video with UIimage vs OpenGL
body: <p>I have an IP camera that streams h264 video over RTSP. On iOS I use FFmpeg to capture the RTSP stream and decode the frames then render with an UIimage and UIimageview.</p>
  
  <p>I have seen examples of of rendering video from FFmpeg, they all seem to use OpenGL ES or the SDL library.</p>
  
  <p>My question is what are the benefits for using OpenGL? since rendering with UIimage is easy and seem to work fine.</p>