title: Generate Video Thumbnails in Java - Many thumbnail on one image
body: <p>I want to generate one big image from video with .mp4 format .
  A sample like it should look:</p>
  <p><a href="https://i.stack.imgur.com/977Qq.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/977Qq.jpg" alt="sample" /></a><br />
  <sub>(source: <a href="http://a1.mzstatic.com/us/r30/Purple/v4/e1/c6/20/e1c620c1-5167-4be1-a037-516fe2114bd8/screen800x500.jpeg" rel="nofollow noreferrer">mzstatic.com</a>)</sub></p>
  <p>Exist any free example of code in java ?
  Any suggestion what library use to do such thing ?</p>