采用海康MV_CC_GetOneFrameTimeout，提示返回值不正常，无数据
MV_CC_DEVICE_INFO_LIST stDeviceList;
void* handle;
memset(&stDeviceList, 0, sizeof(MV_CC_DEVICE_INFO_LIST));
nRet = MV_CC_EnumDevices(MV_GIGE_DEVICE,&stDeviceList);
nRet = MV_CC_CreateHandle(&handle, stDeviceList.pDeviceInfo[0]);//创建句柄
nRet = MV_CC_OpenDevice(handle);//打开句柄
nPacketSize = MV_CC_GetOptimalPacketSize(handle);//获取最佳包大小
MV_CC_SetIntValue(handle,"GevSCPSPacketSize",nPacketSize);//设置最佳包大小
MV_CC_SetEnumValue(handle, "TriggerMode", 0);//设置为不触发
memset(&stParam, 0, sizeof(MVCC_INTVALUE));//获取内存大小
MV_CC_GetIntValue(handle, "PayloadSize", &stParam);
g_nPayloadSize = stParam.nCurValue + 2048;//0、2048、4096都试过
MV_CC_StartGrabbing(handle);//开始取流
stImageInfo = {0};
memset(&stImageInfo, 0, sizeof(MV_FRAME_OUT_INFO_EX));
pData = (unsigned char *)malloc(sizeof(unsigned char)* g_nPayloadSize);
nRet = MV_CC_GetOneFrameTimeout(handle, pData, g_nPayloadSize, &stImageInfo, 1000);
///这里提示nRet ！= MV_OK
///pData无数据，代码0x80000007
///继续点，错误的参数，代码0x80000004
///可发QT源码检查
可发QT源码检查
