title: How to encrypt webm media (specially audio) file using clear key encryption and obtain the key and key id
body: <p>hi I can't seem to be able to encrypt WEBM files and get back any valuable information like key value or key id so i can use them with EME API and create a dash media player so i can protect my media files,
  i am currently using webm-encrypt which encrypt my webm file and generate a key file but i cant seem to know how to use can anyone help me please </p>
  
  <p>link to repo <a href="https://github.com/austinleroy/webm-encrypt" rel="nofollow noreferrer">https://github.com/austinleroy/webm-encrypt</a></p>
  
  <p>and if anyone know any other way to encrypt webm files that will be great, other than webm_crypt as i cant seem to figure out how to install it and make it work</p>