title: "The encoder 'aac' is experimental but experimental codecs are not enabled"
body: <p>While converting <code>flv</code> to <code>mp4</code> conversion using <code>FFMPEG</code> it's showing following error</p>
  <blockquote>
  <p>[aac @ 0x2b4b640] The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.</p>
  </blockquote>