title: ffmpeg timestamp to logfile
body: <p>How can I log the timestamp for each frame?</p>
  
  <p>Command:</p>
  
  <pre><code> ffmpeg -i movie.mp4 image%d.jpg -vstats -timestamp now
  </code></pre>
  
  <p>Log file:</p>
  
  <pre><code>root@chef-server:/home/user# cat vstats_111633.log
  frame=     1 q= 1.8 f_size=  14964 s_size=       15kB time= 0.040 br=  2992.8kbits/s avg_br=  2992.8kbits/s type= I
  frame=     2 q= 1.6 f_size= 150673 s_size=      162kB time= 0.080 br= 30134.6kbits/s avg_br= 16563.7kbits/s type= I
  frame=     3 q= 1.6 f_size= 150794 s_size=      309kB time= 0.120 br= 30158.8kbits/s avg_br= 21095.4kbits/s type= I
  frame=     4 q= 2.1 f_size= 150853 s_size=      456kB time= 0.160 br= 30170.6kbits/s avg_br= 23364.2kbits/s type= I
  frame=     5 q= 4.4 f_size=  95332 s_size=      549kB time= 0.200 br= 19066.4kbits/s avg_br= 22504.6kbits/s type= I
  frame=     6 q= 7.0 f_size=  65227 s_size=      613kB time= 0.240 br= 13045.4kbits/s avg_br= 20928.1kbits/s type= I
  frame=     7 q= 9.8 f_size=  50215 s_size=      662kB time= 0.280 br= 10043.0kbits/s avg_br= 19373.1kbits/s type= I
  </code></pre>
  
  <p>So ideal would be to log the timestamp e.g 11:33:56</p>