title: Cut video with ffmpeg in Ubuntu
body: <p>I execute the command in Ubuntu to cut a video:</p>
  
  <pre><code>/usr/bin/ffmpeg -i video.mp4 -an -ss 00:00:1 -t 00:00:08 -async 1
  </code></pre>
  
  <p>In Windows 10 its work, but not work in Ubuntu.</p>
  
  <p>I receive in Ubuntu the warning:</p>
  
  <p><strong>Trailing options were found on the commandline.</strong></p>
  
  <p>and receive the error:</p>
  
  <p><strong>At least one output file must be specified</strong></p>
  
  <p>What do I do?</p>