我們知道EasyNVR中可以獲取快照資訊，之前的文章也說明了EasyNVR是如何進行快照抓取的

這裡我們使用另一種方法進行快照的抓取

流程

獲取裝置能力Capabilities

獲取裝置的能力，並且可以獲取到Media和PTZ的URI，使用Media的URI，可以進行快照的抓取

_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;
    }
}

獲取Media Profile

獲取Profile token可以獲取對應的快照

_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;
            //一般裝置包含多個Profile Token，包含主碼流、子碼流、第三碼流
        }
    }
}

獲取快照訪問地址

快照訪問地址通常為HTTP地址，可以通過這個HTTP地址GET到快照檔案

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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