title: ffmpeg -itsoffset option has no effect
body: <p>I want to fix audio sync problems. I looked in MPC-HC that audio should be delayed by 2750 milleseconds.</p>
  
  <p>The following two commands</p>
  
  <pre><code>ffmpeg -itsoffset +2.750 -i MyFile.avi -vcodec copy -ss 00:28:32 -to 00:29:30 MyFile2.avi
  ffmpeg -itsoffset -2.750 -i MyFile.avi -vcodec copy -ss 00:28:32 -to 00:29:30 MyFile2.avi
  </code></pre>
  
  <p>give exactly the same result (video and audio non synchronized and shifted equally).</p>
  
  <p>I.e. <code>-itsoffset</code> option does not work.</p>
  
  <p>Why?</p>