HLS m3u8 format with Verimatrix DRM, VG DRM and Keystore

HLS master m3u8 会包含几种bitrate的信息，而每一种sub bitrate m3u8则包含没个ts segment的信息。如果是加密带有DRM信息的HLS 文件，master m3u8不含有Key和license的信息，而每一种sub bitrate m3u8则会含有key的信息。今天在项目的系统中调试了Verimatrix, VG DRM这两种DRM，下面可以看看key的部分还是有不同的。

Verimatrix

#EXTM3U #EXT-X-TARGETDURATION:11 #EXT-X-VERSION:4 #EXT-X-MEDIA-SEQUENCE:0 #EXT-X-PLAYLIST-TYPE:VOD #EXT-X-KEY:METHOD=AES-128,URI="http://127.0.0.1:8260/hls/client/keyfile/vod003" #EXTINF:10.01, 1308347/30960.ts #EXTINF:10.01, 1308347/931860.ts #EXTINF:10.01, 1308347/1832760.ts #EXTINF:10.01, 1308347/2733660.ts #EXTINF:10.01, 1308347/3634560.ts #EXTINF:10.01, 1308347/4535460.ts #EXTINF:10.01, 1308347/5436360.ts #EXTINF:10.01, 1308347/6337260.ts #EXTINF:10.01, 1308347/7238160.ts #EXTINF:10.01, "1308347.m3u8.2" 33L, 634C

VG 

#EXTM3U #EXT-X-TARGETDURATION:11 #EXT-X-VERSION:4 #EXT-X-MEDIA-SEQUENCE:0 #EXT-X-PLAYLIST-TYPE:VOD #EXT-X-KEY:METHOD=AES-128,URI="8170110000080C0D9277D62C121EF1A2763B6E00", IV=0xB7295D642E8F4A65316B8221CB4654A0 #EXTINF:10.01, 1308347/30960.ts #EXTINF:10.01, 1308347/931860.ts #EXTINF:10.01, 1308347/1832760.ts #EXTINF:10.01, 1308347/2733660.ts #EXTINF:10.01, 1308347/3634560.ts #EXTINF:10.01, 1308347/4535460.ts #EXTINF:10.01, 1308347/5436360.ts #EXTINF:10.01, 1308347/6337260.ts #EXTINF:10.01,