<?xml version="1.0" encoding="UTF-8"?>

<!--
  This XML file describes the encryption applied to |bipbop-cenc*|. To
  generate the bipbop-cenc files, run the following commands:

  Encrypt bipbop-no-edts.mp4 with the keys specified in this file,
  and output to |bipbop-cenc-{video,audio}.mp4|
    MP4Box -crypt bipbop-frag-cenc.xml -rem 2 -out bipbop-cenc-video.mp4 bipbop-no-edts.mp4
    MP4Box -crypt bipbop-frag-cenc.xml -rem 1 -out bipbop-cenc-audio.mp4 bipbop-no-edts.mp4

  Fragment |bipbop-cenc-*.mp4| into 500ms segments:
    MP4Box -dash 500 -rap -segment-name bipbop-cenc-video -subsegs-per-sidx 5 bipbop-cenc-video.mp4
    MP4Box -dash 500 -rap -segment-name bipbop-cenc-audio -subsegs-per-sidx 5 bipbop-cenc-audio.mp4

  The above command will generate a set of fragments in |bipbop-cenc-{video,audio}*.m4s
  and |bipbop-cenc-{video,audio}init.mp4| containing just the init segment.

  To cut down the duration, we throw out all but the first 3 audio & 2 video segments:
    rm bipbop-cenc-audio{[^123],[123][^.]}.m4s
    rm bipbop-cenc-video{[^12],[12][^.]}.m4s

  MP4Box will also have generated some *.mpd files we don't need:
    rm bipbop-cenc-*.mpd

  Delete intermediate encrypted files:
    rm bipbop-cenc-{audio,video}.mp4
-->

<GPACDRM type="CENC AES-CTR">

  <DRMInfo type="pssh" version="1">
    <!--
    SystemID specified in
    https://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/cenc-format.html
    -->
    <BS ID128="1077efecc0b24d02ace33c1e52e2fb4b" />
    <!-- Number of KeyIDs = 2 -->
    <BS bits="32" value="2" />
    <!-- KeyID -->
    <BS ID128="0x7e571d037e571d037e571d037e571d03" />
    <BS ID128="0x7e571d047e571d047e571d047e571d04" />
  </DRMInfo>

  <CrypTrack trackID="1" isEncrypted="1" IV_size="16" saiSavedBox="senc"
    first_IV="0x00000000000000000000000000000000">
    <key KID="0x7e571d037e571d037e571d037e571d03"
      value="0x7e5733337e5733337e5733337e573333" />
  </CrypTrack>

  <CrypTrack trackID="2" isEncrypted="1" IV_size="16" saiSavedBox="senc"
    first_IV="0x00000000000000000000000000000000">
    <key KID="0x7e571d047e571d047e571d047e571d04"
      value="0x7e5744447e5744447e5744447e574444" />
  </CrypTrack>

</GPACDRM>
