title: how to use full Decrypt keys via FFmpeg
body: <p>I would like to ask how can I use both DRM keys on FFmpeg to decrypt an MPD , I regulary use second part of key to tun it . , so for example if they keys are :</p>
  <p>065c29054f433aa682fd151ab8f0d854:55fb14690af3c5e9ad8ccf869ad588a5 , I use</p>
  <p>-decryption_key 55fb14690af3c5e9ad8ccf869ad588a5  -i https://**************.mpd</p>
  <p>but seeems some dash require to use full Decrypt key <em><strong><strong><strong><strong><strong><strong><strong><strong><strong>:</strong></strong></strong></strong></strong></strong></strong></strong></strong></em> to be able to run mpd .</p>
  <p>how can i put that via using FFmpeg ? as i tried multiple way without success yet .</p>
  <p>thank you</p>