blob: 6f6a4d90a91690698ccdbae5e77dac0bdf792372 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
<?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>
|
