title: Detect MPEG4/H264 I-Frame (IDR) in RTP stream
body: <p>I need to detect MPEG4 I-Frame in RTP packet. I know how to remove RTP header and get the MPEG4 frame in it, but I can't figure out how to identify the I-Frame.</p>
  
  <p>Does it have a specific signature/header?</p>