зеркало из https://github.com/mozilla/gecko-dev.git
58 строки
2.1 KiB
XML
58 строки
2.1 KiB
XML
<?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>
|