title: How can I extract audio from video with ffmpeg?
body: <p>I tried the following command to extract audio from video:</p>
  
  <pre><code>ffmpeg -i Sample.avi -vn -ar 44100 -ac 2 -ab 192k -f mp3 Sample.mp3
  </code></pre>
  
  <p>but I get the following output</p>
  
  <pre><code>libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
  SamplE.avi: Invalid data found when processing input
  </code></pre>
  
  <p>Can anyone help, please?</p>