title: How build ffmpeg optimized for iOS, using hardware decoding probably?
body: <p>I make a FFMPEG-based player for ios. It works fine on simulator, but on real-device (iPhone 4) the frame rate is low and make my audio and video out of sync. the player works fine on iPhone 4s, so I guess it's just problem about device's computing power.</p>
  
  <p>So, is there anyway to build FFMPEG optimized for iOS device (armv7, arvm7s arch)? or is there anyway to utilize ios device hardware to decode video stream?</p>
  
  <p>My video stream is encode in H264/AAC.</p>