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public static List<CameraDevice> GetAllConnectedCameras()
{
    var cameras = new List<CameraDevice>();
    using (var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PnPEntity WHERE (PNPClass = 'Camera')"))
    {
        foreach (var device in searcher.Get())
        {
            cameras.Add(new CameraDevice()
            {
                Name = device["Caption"].ToString(),
                Status = device["Status"].ToString(),
                DeviceId = device["DeviceID"].ToString()
            });
        }
    }

    cameras = cameras.OrderBy(c => c.DeviceId).ToList();
    for (int i = 0; i < cameras.Count; ++i)
        cameras[i].OpenCvId = i;

    return cameras;
}

public class CameraDevice
{
    public int OpenCvId { get; set; }

    public string Name { get; set; }
    public string DeviceId { get; set; }
    public string Status { get; set; }
}

== VIDEO DEVICE (id:0) ==
Name: HD Pro Webcam C920
Path: \\?\usb#vid_046d&pid_082d&mi_00#7&3561b19d&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global

== VIDEO DEVICE (id:1) ==
Name: FLIR USB Video
Path: \\?\usb#vid_09cb&pid_1007&mi_00#6&1e15415f&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global