title: Adjust framerate MPG4 in ffMpeg
body: <p>I'm trying to create a MPG4 movie from a bunch of png's. I want the movie to show one of the PNG-pictures every 1/5th second. So I tried the following command:</p>
  
  <pre><code>ffmpeg -i ffmpeg_temp/%05d.png -r 5 video.mp4
  </code></pre>
  
  <p>Now I get a movie of only 40 seconds, in which lot's of frames completely disappear.</p>
  
  <p>I have around a 1000 pictures and want that to be a movie of around  3 minutes (5 fps).</p>