title: What does this one byte mean in NALu
body: <p>For NALu (Network abstraction Layer Units) I can interpret below</p>
  
  <p>000000 0109f000 00000167....</p>
  
  <p>00000001 -> Start code prefix</p>
  
  <p>09 -> NALu type.</p>
  
  <p><strong>f0 -> ??</strong></p>
  
  <p>00000001 -> Start code prefix</p>
  
  <p>67 -> SPS</p>
  
  <p>So what is the meaning of <strong>f0</strong>?</p>
  
  <p><strong>UPDATED</strong></p>
  
  <p>As answered in comments, F0 means that any slice type will be present in this NAL.</p>
  
  <p>FYI</p>
  
  <pre><code>(primary_pic_type = 0xe) + rbsp stop one bit = 0xf0
  </code></pre>