将OpenCV视频捕获设备友好名称与Python端口号关联

Question

我想获取Windows平台上使用Python的外部USB视频捕获设备的友好名称和USB端口号。我正在使用OpenCV从USB采集设备上采集视频。对于外部USB视频捕获设备(EasyCap、Hauppauge USB Live-2等)，OpenCV将USB端口称为“-1”(找到的第一个工作摄像头)、“0”(对我来说，这是网络摄像头)和“1”、“2”等。以下是在OpenCV中连接到网络摄像头的一行示例：

cap = cv2.VideoCapture(0)

我有三个外部视频捕获设备和一个摄像头。下面是我的代码，它成功地显示了这些设备的友好名称(我不确定这是否适用于所有USB视频捕获设备)：

import wmi
c = wmi.WMI()
wql = "Select * From Win32_USBControllerDevice"
for item in c.query(wql):
    a = item.Dependent.PNPClass
    b = item.Dependent.Name.upper()
    if (a.upper() == 'MEDIA' or a.upper() == 'CAMERA') and 'AUDIO' not in b:
        print(item.Dependent.Name)

结果是：

Integrated Webcam
Hauppauge USB-Live2
USB TV Tuner
USB Video Device

如果将print语句替换为，则可以打印所有设备信息

print(item.Dependent)

然后我得到了以下结果：

instance of Win32_PnPEntity
{
        Caption = "Integrated Webcam";
        ClassGuid = "{ca3e7ab9-b4c3-4ae6-8251-579ef933890f}";
        CompatibleID = {"USB\\Class_0e&SubClass_03&Prot_00", "USB\\Class_0e&SubClass_03", "USB\\Class_0e"};
        ConfigManagerErrorCode = 0;
        ConfigManagerUserConfig = FALSE;
        CreationClassName = "Win32_PnPEntity";
        Description = "USB Video Device";
        DeviceID = "USB\\VID_0BDA&PID_5686&MI_00\\6&153A3DF0&0&0000";
        HardwareID = {"USB\\VID_0BDA&PID_5686&REV_5729&MI_00", "USB\\VID_0BDA&PID_5686&MI_00"};
        Manufacturer = "Microsoft";
        Name = "Integrated Webcam";
        PNPClass = "Camera";
        PNPDeviceID = "USB\\VID_0BDA&PID_5686&MI_00\\6&153A3DF0&0&0000";
        Present = TRUE;
        Service = "usbvideo";
        Status = "OK";
        SystemCreationClassName = "Win32_ComputerSystem";
        SystemName = "MY-LAPTOP";
};


instance of Win32_PnPEntity
{
        Caption = "Hauppauge USB-Live2";
        ClassGuid = "{4d36e96c-e325-11ce-bfc1-08002be10318}";
        CompatibleID = {"USB\\Class_ff&SubClass_ff&Prot_ff", "USB\\Class_ff&SubClass_ff", "USB\\Class_ff"};
        ConfigManagerErrorCode = 0;
        ConfigManagerUserConfig = FALSE;
        CreationClassName = "Win32_PnPEntity";
        Description = "Hauppauge USB-Live2";
        DeviceID = "USB\\VID_2040&PID_C200&MI_01\\6&19EA708B&0&0001";
        HardwareID = {"USB\\VID_2040&PID_C200&REV_4001&MI_01", "USB\\VID_2040&PID_C200&MI_01"};
        Manufacturer = "Hauppauge";
        Name = "Hauppauge USB-Live2";
        PNPClass = "MEDIA";
        PNPDeviceID = "USB\\VID_2040&PID_C200&MI_01\\6&19EA708B&0&0001";
        Present = TRUE;
        Service = "hcw10bda";
        Status = "OK";
        SystemCreationClassName = "Win32_ComputerSystem";
        SystemName = "MY-LAPTOP";
};


instance of Win32_PnPEntity
{
        Caption = "USB TV Tuner";
        ClassGuid = "{4d36e96c-e325-11ce-bfc1-08002be10318}";
        CompatibleID = {"USB\\Class_FF&SubClass_00&Prot_FF", "USB\\Class_FF&SubClass_00", "USB\\Class_FF"};
        ConfigManagerErrorCode = 0;
        ConfigManagerUserConfig = FALSE;
        CreationClassName = "Win32_PnPEntity";
        Description = "USB TV Tuner";
        DeviceID = "USB\\VID_1B71&PID_3002\\300000000002";
        HardwareID = {"USB\\VID_1B71&PID_3002&REV_0100", "USB\\VID_1B71&PID_3002"};
        Manufacturer = "Active Development Co., Ltd.";
        Name = "USB TV Tuner";
        PNPClass = "MEDIA";
        PNPDeviceID = "USB\\VID_1B71&PID_3002\\300000000002";
        Present = TRUE;
        Service = "X86BDA";
        Status = "OK";
        SystemCreationClassName = "Win32_ComputerSystem";
        SystemName = "MY-LAPTOP";
};


instance of Win32_PnPEntity
{
        Caption = "USB Video Device";
        ClassGuid = "{ca3e7ab9-b4c3-4ae6-8251-579ef933890f}";
        CompatibleID = {"USB\\Class_0e&SubClass_03&Prot_00", "USB\\Class_0e&SubClass_03", "USB\\Class_0e"};
        ConfigManagerErrorCode = 0;
        ConfigManagerUserConfig = FALSE;
        CreationClassName = "Win32_PnPEntity";
        Description = "USB Video Device";
        DeviceID = "USB\\VID_1E4E&PID_701F&MI_00\\6&3543E1D5&0&0000";
        HardwareID = {"USB\\VID_1E4E&PID_701F&REV_0100&MI_00", "USB\\VID_1E4E&PID_701F&MI_00"};
        Manufacturer = "Microsoft";
        Name = "USB Video Device";
        PNPClass = "Camera";
        PNPDeviceID = "USB\\VID_1E4E&PID_701F&MI_00\\6&3543E1D5&0&0000";
        Present = TRUE;
        Service = "usbvideo";
        Status = "OK";
        SystemCreationClassName = "Win32_ComputerSystem";
        SystemName = "MY-LAPTOP";
};

在这些结果中一定有一些东西表明了外部设备连接到的端口，但我没有看到它。关于如何将友好名称与OpenCV识别的端口号相关联的建议？

Answer 1

我找到了一个非常有效的解决方案。可以在这里找到CV-camera-finder：https://github.com/pvys/CV-camera-finder。