title: Extracted audio from video files is too large
body: <p>I am trying to extract audio from the video files. I have tried libraries like moviepy, ffmpeg in python.
  The extracted audio files are too large in size. For an audio file of size 75 MB the audio file is of around 1.1 GB from moviepy. Even with bit rate of 16 kbps and sample rate to 16000 Hz extracted file is coming as 200 MB in size. Any other libraries or the way by which extracted audio files are atleast same size or less than complete video file.</p>
  
  <pre><code>'ffmpeg -i trial_copy.mp4 -ac 1 -ab 16000 -ar 16000 output.wav'
  </code></pre>
  
  <p>I am using above command in ffmpeg. </p>