title: How to resize an image with ffmpeg
body: <p>I have not used ffmpeg before, this is my first time. It is creating image thumbnails but the images are way too big so I just need to scale them down.
  I have an argument that is creating a thumbnail here: </p>
  
  <pre><code>processInfo.FileName = "\"" +HttpContext.Current.Server.MapPath("/ffmpeg.exe") + "\"";
  processInfo.Arguments = string.Format("-ss {0} -i {1} -f image2 -vframes 1 -y {2}", 5, "\"" + HttpContext.Current.Server.MapPath(file) + "\"", "\"" + HttpContext.Current.Server.MapPath(newfilename) + "\"");
  </code></pre>
  
  <p>So my question is, where inside of the argument can I specify the output image size?</p>