title: How to use FFMpeg -timestamp syntax
body: <p><img src="https://i.stack.imgur.com/0nYz8.jpg" alt="enter image description here"></p>
  
  <p>Hi, All!</p>
  
  <pre><code>     ffMpeg -timstamp 
  </code></pre>
  
  <p>option works likes upper image?
  07:21:54 07/07/05 white text in black box container.</p>
  
  <p>in ubuntu 12.04
  typed the excute like this.</p>
  
  <pre><code>     ffmpeg -y -f video4linux2 -s vga -r 30 -fs 1M -i /dev/video0 -timestamp now -copyts ./USB1_Test_vga.mp4
  </code></pre>
  
  <p>but it doesn't work.</p>
  
  <p>is there any other option for display video recorded time?</p>