title: Playing encrypted MP4
body: <p><p>I'm making a <strong>(local - Multi-Platform) video protection app</strong> but I don't know what is the right solution to first "encrypt->save on HDD" and then <strong>"load from HDD->decrypt->play"</strong> encrypted video.</p> <p>I read about MPEG-DASH and some DRMs and found this Bento4 command:</p>
  
  <pre><code>mp4dash --encryption-key=000102030405060708090a0b0c0d0e0f:00112233445566778899aabbccddeeff --encryption-args="--property 1:ClearLeadFragments:10 --property 2:ClearLeadFragments:10" movie.mp4
  </code></pre>
  
  <p>but I'm not sure that MPEG-DASH can be a part of solution or not.</p> How can I solve this?</p>