title: Rails not responding to ffmpeg commands
body: <p>I am trying to run this command here:</p>
  
  <pre><code>f = open("|ffmpeg -i /Users/joaoh82/Desktop/teste.MP4")
  result = f.read()
  </code></pre>
  
  <p>But I am not getting any response...</p>
  
  <p>But when I try this command in the terminal it works great:</p>
  
  <pre><code>ffmpeg -i /Users/joaoh82/Desktop/teste.MP4
  </code></pre>
  
  <p>But now on rails code. Funny thing is that when I try the same thing with some else like an echo $PATH it works great! Like:</p>
  
  <pre><code>f = open("|echo $PATH")
  result = f.read()
  </code></pre>
  
  <p>Any ideas!?</p>