title: Flatten 360 fisheye video
body: <p>i recently bought a RICOH THETA S, for recording soccer games in 360 vr.
  I would like to use ffmpeg to flatten my fisheye movie recorded with my cam, thats possible ?
  <a href="https://i.stack.imgur.com/NBgXz.jpg" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p>how can i do ?
  Thanks !
  Top</p>