title: FFMPEG no metadata
body: <p>I am trying to dump all the important info using <code>ffmpeg.exe -i "1.mp4" -f ffmetadata metadata.txt</code> yet all I get is </p>
  
  <pre><code>;FFMETADATA1
  major_brand=isom
  minor_version=1
  compatible_brands=isom
  </code></pre>
  
  <p>Official documentation gives no clues at all</p>