海康威视官方SDK，demo测试，实现预览和基本控制功能

[{"title":"（ 52 个子文件 24.97MB ） 海康威视官方SDK，demo测试，实现预览和基本控制功能","children":[{"title":"demo","children":[{"title":"demo.pro <span style='color:#111;'> 702B </span>","children":null,"spread":false},{"title":"demo.pro.user <span style='color:#111;'> 23.42KB </span>","children":null,"spread":false},{"title":"include","children":[{"title":"LinuxPlayM4.h <span style='color:#111;'> 34.95KB </span>","children":null,"spread":false},{"title":"HCNetSDK.h <span style='color:#111;'> 2.50MB </span>","children":null,"spread":false},{"title":"WindowsPlayM4.h <span style='color:#111;'> 19.66KB </span>","children":null,"spread":false},{"title":"PlayM4.h <span style='color:#111;'> 276B </span>","children":null,"spread":false}],"spread":true},{"title":".qmake.stash <span style='color:#111;'> 751B </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 261B </span>","children":null,"spread":false},{"title":"mainwindow.ui <span style='color:#111;'> 8.33KB 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