23、window10下获取摄像头编号及名称

基本思想：项目中需要动态获取外设红外设备的编号，进行视频流进行检测和处理

代码：

#include<opencv2/objdetect/objdetect.hpp>
#include<opencv2/highgui/highgui.hpp>
#include "windows.h"
#include "dshow.h"
#include <iostream>

#pragma comment(lib, "strmiids.lib")
#pragma comment(lib, "quartz.lib")

using namespace cv;
using namespace std;

int listDevices(vector<string>& list) {

    //COM Library Initialization
    //comInit();

    ICreateDevEnum* pDevEnum = NULL;
    IEnumMoniker* pEnum = NULL;
    int deviceCounter = 0;
    CoInitialize(NULL);

    HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
        CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
        reinterpret_cast<void**>(&pDevEnum));


    if (SUCCEEDED(hr))
    {
        // Create an enumerator for the video capture category.
        hr = pDevEnum->CreateClassEnumerator(
            CLSID_VideoInputDeviceCategory,
            &pEnum, 0);

        if (hr == S_OK) {

            printf("SETUP: Looking For Capture Devices\n");
            IMoniker* pMoniker = NULL;

            while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {

                IPropertyBag* pPropBag;
                hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag,
                    (void**)(&pPropBag));

                if (FAILED(hr)) {
                    pMoniker->Release();
                    continue;  // Skip this one, maybe the next one will work.
                }

                // Find the description or friendly name.
                VARIANT varName;
                VariantInit(&varName);
                hr = pPropBag->Read(L"Description", &varName, 0);

                if (FAILED(hr)) hr = pPropBag->Read(L"FriendlyName", &varName, 0);

                if (SUCCEEDED(hr))
                {

                    hr = pPropBag->Read(L"FriendlyName", &varName, 0);

                    int count = 0;
                    char tmp[255] = { 0 };
                    //int maxLen = sizeof(deviceNames[0]) / sizeof(deviceNames[0][0]) - 2;
                    while (varName.bstrVal[count] != 0x00 && count < 255)
                    {
                        tmp[count] = (char)varName.bstrVal[count];
                        count++;
                    }
                    list.push_back(tmp);
                    //deviceNames[deviceCounter][count] = 0;

                    //if (!silent) DebugPrintOut("SETUP: %i) %s\n", deviceCounter, deviceNames[deviceCounter]);
                }

                pPropBag->Release();
                pPropBag = NULL;

                pMoniker->Release();
                pMoniker = NULL;

                deviceCounter++;
            }

            pDevEnum->Release();
            pDevEnum = NULL;

            pEnum->Release();
            pEnum = NULL;
        }

        //if (!silent) DebugPrintOut("SETUP: %i Device(s) found\n\n", deviceCounter);
    }

    //comUnInit();

    return deviceCounter;
}

int main()
{
    vector<string> list;
    listDevices(list);
    int capid0 = 0, capid1 = 0;
    cout << "dev_size =      " << list.size() << endl;
    for (int i = 0; i < list.size(); i++)
    {
        if (list[i] == "HD Pro Webcam C920")
            capid0 = i;
        if (list[i] == "S0-40")
            capid1 = i;
        cout << "device lists:" << list[i] << '\t' << "i=" << i << endl;

         
    }
   
    return 0;
}

测试结果

SETUP: Looking For Capture Devices
dev_size =      2
device lists:HD Pro Webcam C920 i=0
device lists:S0-40      i=1

F:\sxj\20200107\detectPhone\Project1\x64\Release\Project1.exe (进程 29892)已退出，代码为 0。

转载：​​OpenCV获取摄像头编号及名称_Yancy_的博客-_opencv usb摄像头 序号​​