在这里有 海康DVR的SDK 可以实现回放，云台功能-Here are the SDK can Haikang DVR playback, PTZ function

网络硬盘录像机SDK，包括监控录像的记录与回放，报警点设置，多频道多画面设置-Network DVR SDK, including the recording and playback of video surveillance, alarm point setting, multi-channel multi-screen settings