зеркало из https://github.com/mozilla/gecko-dev.git
58 строки
2.1 KiB
XML
58 строки
2.1 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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This XML file describes the encryption applied to |bipbop-cenc*|. To
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generate the bipbop-cenc files, run the following commands:
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Encrypt bipbop-no-edts.mp4 with the keys specified in this file,
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and output to |bipbop-cenc-{video,audio}.mp4|
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MP4Box -crypt bipbop-frag-cenc.xml -rem 2 -out bipbop-cenc-video.mp4 bipbop-no-edts.mp4
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MP4Box -crypt bipbop-frag-cenc.xml -rem 1 -out bipbop-cenc-audio.mp4 bipbop-no-edts.mp4
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Fragment |bipbop-cenc-*.mp4| into 500ms segments:
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MP4Box -dash 500 -rap -segment-name bipbop-cenc-video -subsegs-per-sidx 5 bipbop-cenc-video.mp4
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MP4Box -dash 500 -rap -segment-name bipbop-cenc-audio -subsegs-per-sidx 5 bipbop-cenc-audio.mp4
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The above command will generate a set of fragments in |bipbop-cenc-{video,audio}*.m4s
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and |bipbop-cenc-{video,audio}init.mp4| containing just the init segment.
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To cut down the duration, we throw out all but the first 3 audio & 2 video segments:
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rm bipbop-cenc-audio{[^123],[123][^.]}.m4s
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rm bipbop-cenc-video{[^12],[12][^.]}.m4s
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MP4Box will also have generated some *.mpd files we don't need:
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rm bipbop-cenc-*.mpd
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Delete intermediate encrypted files:
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rm bipbop-cenc-{audio,video}.mp4
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-->
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<GPACDRM type="CENC AES-CTR">
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<DRMInfo type="pssh" version="1">
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<!--
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SystemID specified in
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https://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/cenc-format.html
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-->
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<BS ID128="1077efecc0b24d02ace33c1e52e2fb4b" />
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<!-- Number of KeyIDs = 2 -->
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<BS bits="32" value="2" />
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<!-- KeyID -->
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<BS ID128="0x7e571d037e571d037e571d037e571d03" />
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<BS ID128="0x7e571d047e571d047e571d047e571d04" />
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</DRMInfo>
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<CrypTrack trackID="1" isEncrypted="1" IV_size="16" saiSavedBox="senc"
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first_IV="0x00000000000000000000000000000000">
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<key KID="0x7e571d037e571d037e571d037e571d03"
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value="0x7e5733337e5733337e5733337e573333" />
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</CrypTrack>
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<CrypTrack trackID="2" isEncrypted="1" IV_size="16" saiSavedBox="senc"
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first_IV="0x00000000000000000000000000000000">
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<key KID="0x7e571d047e571d047e571d047e571d04"
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value="0x7e5744447e5744447e5744447e574444" />
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</CrypTrack>
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</GPACDRM>
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