title: How can I detect camera movement on FPS games basaed on game replay vid?
body: <p>I wonder if I can detect a FPS game player's camera movement by simply using his vid replay? </p>
  
  <p>What I am trying to do are to:</p>
  
  <ol>
  <li><p>get precise camera movement when player in scope mode</p></li>
  <li><p>get relatively precise camera movement when people in casual mode</p></li>
  </ol>
  
  <p>But the problems I am facing are:</p>
  
  <ol>
  <li><p>the marksman line are blocking some area of the screen, which make it hard to align the pixels.</p></li>
  <li><p>the gun/UI and some other elements in the UI make it even harder in casual mode than scope mode.</p></li>
  </ol>
  
  <p>Hopefully I get my question correctly asked.</p>
  
  <p>a simple sample of my prblem 1:  [1]: <a href="https://i.stack.imgur.com/rM8by.jpg" rel="nofollow noreferrer">https://i.stack.imgur.com/rM8by.jpg</a></p>