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!!

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>
 
============================================================================
#include <opencv2\opencv.hpp>
#include <opencv2\highgui.hpp>
using namespace cv;
 
cv;
int main(int, char**) {
VideoCapture vcap;
Mat image;
 
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!!