title: grabbing and merging multi screenshots using FFMPEG
body: <p>
  is there a way using FFMPEG to grab multiple screenshots from a video and then merge e.g 8 screens into on image?</p>
  
  <p>for example the end result would look like this:</p>
  
  <p><a href="https://i.stack.imgur.com/bwTiB.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bwTiB.jpg" alt="enter image description here"></a></p>