解密用：mp4decrypt.exe和shaka-packager.exe
https://www.bento4.com/downloads/
shaka-packager.exe。都下载放到文件夹。
https://github.com/shaka-project/shaka-packager/releases/tag/v3.4.2
ffmpeg下载：https://www.gyan.dev/ffmpeg/builds/
切记！！！！apple需要用命令分别下载、自动解视频和音频。然后用mkvtoolnix封装！感谢站长的帮助！
cc "https://play.itunes.apple.com/WebObjects/MZPlay.woa/hls/playlist.m3u8?cc=US&a=465555&id=6475555&aec=HD&l=en" --key 00000000545454bde216336202020202020:c36b9a9ff342101a5f6acf696a6cd7ed --use-shaka-packager
非apple视频自动合并：
cc "https://ec02-krk2.cache./PLA_15119013.mpd" --key f2e472573f554f4fbffe5b83f2bc273a:a6a74479d54ef92a8eb7d2d3d5b152c2 --key d5d6b215dd35430fbecc8f0fe67a5760:115cf7d288dac3f75423eccd4edc0d29 --key c63a35d5d2414dfaad5c4f16c811e2f6:805fa9e010b9621049316d97557b7807 --key 98dc237e08d84607ad0510d445cc2e58:68e4c1abf58c955c318fa95872c385ce --save-name "shuchumingzi" -M mp4 --use-shaka-packager
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