Use OpenCV to obtain PiCar MJPG-streamer video

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I have built a SunFounder PiCar-V (Raspberry Pi 3 running Raspbian) which uses a Python server "running a software written for the MJPG-streamer project". I wish to capture the video stream with OpenCV 3.30 x64 in C++. Below is my test program which shows the result occurring.

// ============================================================================
// PiCarVideoTest - Testing how to use OpenCV to open PiCar video stream.
// Debug x64 version with property sheet: 
//    C++ - Additional Include Directories: $(OPENCV_BUILD)\include
//    Linker - Additional Library Directories: $(OPENCV_BUILD)\x64\vc14\lib
//    Linker - Additional Dependencies: opencv_world330d.lib;...
// Result of program - vcap.open fails:
//   warning: Error opening file(/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:792)
//   warning: http://192.168.0.81:8080/?action=stream;dummy=param.mjpg (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:793)
// ============================================================================

#include <opencv2\opencv.hpp>
#include <opencv2\highgui.hpp>

using namespace cv;

int main(int, char**) {
    VideoCapture vcap;
    Mat image;

    // Setup video stream location per internet research results.
    const std::string videoStreamAddress = "http://192.168.0.81:8080/?action=stream;dummy=param.mjpg";

    // Open the video stream and check that open was successful.
    if (!vcap.open(videoStreamAddress)) {
        std::cout << "Error opening video stream or file" << std::endl;
        return -1;
    }
...

It appears OpenCV is attempting to treat the internet address as a file name. I have fought this problem for two days and have not been successful at solving it. Any help would be greatly appreciated!!