title: Wrong frame rate when saving camera feed to a file using FFMPEG
body: <p>I'm trying to save the live feed from an IP camera to a file but the resulting file always plays much faster than the original speed.</p>
  
  <p>I have tried with the following commands:</p>
  
  <pre><code>ffmpeg -i http://171.22.3.47/image -vcodec copy -an -t 900 c:\output.mp4
  
  ffmpeg -i http://171.22.3.47/image -c:v libx264 -an c:\output.mp4
  </code></pre>
  
  <p>Does anybody know what I'm missing? Both commands create the file and I can use Windows Media Player to play them, but they run much faster.</p>