title: getting error while converting wav to amr using ffmpeg
body: <p>I am using ffmpeg to convert amr to wav and wav to amr.Its successfully converting amr to wav but not viceversa. As ffmpeg is supporting amr encoder decoder, its giving error.</p>
  
  <blockquote>
    <p>ffmpeg -i testwav.wav  audio.amr </p>
  </blockquote>
  
  <p>Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height</p>