将 USB 视频捕获设备友好名称与 Python 中的 OpenCV 端口号相关联

Question

我想在 Windows 平台上使用 Python 获取外部 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 捕获设备捕获视频。 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）以及“1”、“2”等，用于外部 USB 视频捕获设备（ EasyCap、Hauppauge USB Live-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网络摄像头。 这是我的代码，成功显示了这些设备的友好名称（我不确定这是否适用于每个 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

如果我将打印语句替换为

，我可以打印所有设备信息

print(item.Dependent)

然后我得到以下结果：

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";
};

这些结果中一定有一些内容表明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 识别的端口号关联起来的建议？

Answer 1

我找到了比第一个更好的解决方案。 我的第一个解决方案是这样的：

我找到了一个非常有效的解决方案。

CV-camera-finder

可以在这里找到：https://github.com/pvys/CV-camera-finder。

此解决方案被锁定在 Python 3.7 中，开发人员存档了该项目，并且没有响应使其与更高版本的 Python 兼容的请求。

新解决方案 我刚刚发现这个解决方案适用于 Python >= 3.6。 效果很好