@Will Stewart: Can you please explain it in simple terms , I have very limited knowledge of Networking.

I did not what exactly you are trying to say. I have very limited knowledge of Networking. Please make me understand in simpler terms. Is their any setting needed to be done for accessing the IP camera then please tell me.

I have small code which is able to display the IP camera using its local IP address. But when the camera is used by its Public IP address i am unable to get the live feed.

include "IpCamTest.h"

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

// This works on a D-Link CDS-932L
//const std::string videoStreamAddress = "http://aID:[email protected]:80/video.cgi?resolution=640x360&req_fps=50&.mjpg";
const std::string videoStreamAddress = "http://id:[email protected]:8088/video.cgi?resolution=640x360&req_fps=50&.mjpg";
//open the video stream and make sure it's opened
if(!vcap.open(videoStreamAddress)) {
    std::cout << "Error opening video stream or file" << std::endl;
    return -1;
}

for(;;) {
    if(!vcap.read(image)) {
        std::cout << "No frame" << std::endl;
        cv::waitKey();
    }
    cv::imshow("Output Window", image);

    if(cv::waitKey(1) >= 0) break;
}

} warning: Could not find codec parameters (../../modules/highgui/src/cap_ffmpeg_impl.hpp:540) Error opening video stream or file

@alanfwilliams: If possible can please share your code for multiple webcam video stream. I have managed to do multiple stream but the when multiple webcam video starts the video starts lagging. I am using MFC, c++

I want to create an application which can display video stream from IP camera using Opencv and MFC, c++. I am able to get video from my IP camera over the lan, But wondering if its possible via internet.

Code I tried.

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

// This works on a D-Link CDS-932L
const std::string videoStreamAddress =

"http://admin:[email protected]:80/video.cgi?resolution=640x360&req_fps=50&.mjpg"; //const std::string videoStreamAddress = "http://admin:[email protected]:8088/mjpg/video.mjpg";

//open the video stream and make sure it's opened
if(!vcap.open(videoStreamAddress)) {
    std::cout << "Error opening video stream or file" << std::endl;
    return -1;
}

for(;;) {
    if(!vcap.read(image)) {
        std::cout << "No frame" << std::endl;
        cv::waitKey();
    }
    cv::imshow("Output Window", image);

    if(cv::waitKey(1) >= 0) break;
}    }

Get warning "Could not find codec parameter ".

I want to display video feed from Multiple IP camera on my network, Currently I am able to display the video feed in picture control in MFC, but the video feed is distrubed when other IP Camera is added. I have coded a timer event where after every 10 milliseconds the QueryFrame for respected camera is called. But the problem is when I add other camera for streaming the video. Either the first IP Camera will disconnect or it will display Frames in slow motion.

@Haris Moonamkunnu: Can you give me some guidance on how to display multiple IP camera using OpenCv parallel in single MFC application. Any demo application would be fine or some tutorial. I just wan to take pictures from the live Feed. and store them.

@Haris Moonamkunnu: Thanks for taking out time and replying to my question highly appreciate your help. Also i am able to do the streaming, of two IP camera parallel , but am facing problem, when both the camera are giving feed one of the camera stops giving the feed.

@Haris Moonamkunnu: I was able to get the stream from My CP-Plus Ip Camera. But for my D-Link Camera when i changed the username,password and Ip in the same link it doesn't work, if you can explain me the problem for the same.

@Haris Moonamkunnu: I was able to solve the problem with following code and URL.

include <stdio.h>

include <opencv2/opencv.hpp>

int main(){

CvCapture *camera=cvCaptureFromFile("http://admin:[email protected]/axis-cgi/mjpg/video.cgi?resolution=640x480&req_fps=30&.mjpg");
if (camera==NULL)
    printf("camera is null\n");
else
    printf("camera is not null");

cvNamedWindow("img");
while (cvWaitKey(10)!=atoi("q")){
    double t1=(double)cvGetTickCount();
    IplImage *img=cvQueryFrame(camera);
    /*if(img){
        cvSaveImage("C:/opencv.jpg",img);
    }*/
    double t2=(double)cvGetTickCount();
    printf("time: %gms  fps: %.2g\n",(t2-t1)/(cvGetTickFrequency()*1000.), 1000./((t2-t1)/(cvGetTickFrequency()*1000.)));
    cvShowImage("img",img);

@Haris Moonamkunnu: What do you mean by "Double heck your link" Sorry this may be stupid question but am a new to Opencv

@Haris Moonamkunnu: Yes am able to display the video using USB Webcam.

Got a new error: Can you please tell me what is it related to ? warning: Could not find codec parameters

(../../modules/highgui/src/cap_ffmpeg_impl.hpp:540)

@Haris Moonamkunnu: I get and error saying warning: Error opening file <../../modules/highgui/src/cap_ffmpeg_impl.hpp:529>

Here's the code which i tried

include <opencv/cv.h>

include <opencv/highgui.h>

using namespace cv;

int main(int argc, char argv[]) { Mat frame; namedWindow("video", 1); VideoCapture cap; cap.open("http://172.41.20.55:80/video/mjpg.cgi?dummy=.mjpg"); / VideoCapture cap(0);*/ while ( cap.isOpened() ) { cap >> frame; if(frame.empty()) break;

    imshow("video", frame);
    if(waitKey(30) >= 0) break;
}

return 0;

} But I am unable to get the video feed.

@Haris Moonamkunnu: I am having problem with getting the live feed from IP Cam. Can you please provide me with a sample code.

@Haris Moonamkunnu: I want to access live video feed from IP camera how can i do it, and the same condition goes with this also, i want multipler camera live feed even for IP camera..

Thanks mate...Let me try the code..

I have implemented code for capturing live video feed from webcam. But the code i have implemented is used 4 cams only. I want to make it dynamic. I.e: If i connect 2 webcam then it should display two windows with live feed. If i connect 3 cams then it should get 3 windows with live feed from all three cameras. I am getting the number of cameras being connected to the system using videoInput.h So now only part is how to make it dynamic for webcam. Here's the code.

int main(){

//Create matrix to store image
Mat image;
Mat image1;
Mat image2;
Mat image3;

//Mat image1;
//initailize capture
videoInput VI;
int numDevices = VI.listDevices();  
VideoCapture cap;
VideoCapture cap1;
VideoCapture cap2;
VideoCapture cap3;

bool x = false;
//VideoCapture cap1;
cap.open(0);
cap1.open(1);
cap2.open(2);
cap3.open(3);

namedWindow("Camera 1",1);
namedWindow("Camera 2",1);
namedWindow("Camera 3",1);
namedWindow("Camera 4",1);

while(1){
    //copy webcam stream to image
    cap >> image;
    cap1 >> image1;
    cap2 >> image2;
    cap3 >> image3;
    cap4 >> image4;
    //cap1 >> image1;
    imshow("Camera 1",image);
    imshow("Camera 2",image1);
    imshow("Camera 3",image2);
    imshow("Camera 4",image3);

    //imshow("Camera 2",image1);
    //delay 33ms
    waitKey(33);
}

}