EasyNVR中使用Onvif协议获取设备快照

我们知道EasyNVR中可以获取快照信息，之前的文章也说明了EasyNVR是如何进行快照抓取的

这里我们使用另一种方法进行快照的抓取

流程

获取设备能力Capabilities

获取设备的能力，并且可以获取到Media和PTZ的URI，使用Media的URI，可以进行快照的抓取

_tds__GetCapabilities* capabilities = soap_new__tds__GetCapabilities(proxyDevice, -1);tt__CapabilityCategory* category = new tt__CapabilityCategory;capabilities->Category = category;*(capabilities->Category) = tt__CapabilityCategory__All;_tds__GetCapabilitiesResponse* response = soap_new__tds__GetCapabilitiesResponse(proxyDevice, -1);if (SOAP_OK == proxyDevice->GetCapabilities(capabilities, response)){    if (response->Capabilities)    {        //Media URI: response->Capabilities->Media->XAddr;        //PTZ URI: response->Capabilities->PTZ->XAddr;    }}

获取Media Profile

获取Profile token可以获取对应的快照

_trt__GetProfiles* getProfiles = soap_new__trt__GetProfiles(proxyMedia, -1);_trt__GetProfilesResponse* response = soap_new__trt__GetProfilesResponse(proxyMedia, -1);if (SOAP_OK == proxyMedia->GetProfiles(getProfiles, response)){    int size = response->__sizeProfiles;    for (int i = 0; i < size; ++i)    {        if (response->Profiles[i])        {            //Media Profile Token: response->Profiles[i]->token;            //一般设备包含多个Profile Token，包含主码流、子码流、第三码流        }    }}

获取快照访问地址

快照访问地址通常为HTTP地址，可以通过这个HTTP地址GET到快照文件

MediaBindingProxy* mediaProxy = new MediaBindingProxy;  mediaProxy->soap_endpoint = mediaUrl.c_str();  if (!security(mediaProxy, username, password))  {      delete mediaProxy;      return result;  }  _trt__GetSnapshotUri* snap = soap_new__trt__GetSnapshotUri(mediaProxy, -1);  _trt__GetSnapshotUriResponse* response = soap_new__trt__GetSnapshotUriResponse(mediaProxy, -1);  snap->ProfileToken = const_cast<char*>(profile.c_str());  if (SOAP_OK == mediaProxy->GetSnapshotUri(snap, response))  {      if (response->MediaUri && response->MediaUri->Uri)      {          //response->MediaUri->Uri          //快照地址      }  }  if (response)      soap_delete__trt__GetSnapshotUriResponse(mediaProxy, response);  if (snap)      soap_delete__trt__GetSnapshotUri(mediaProxy, snap);  return result;

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