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。下面是我的代码，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？
