使用OpenCV访问IP摄像机 [英] IP Camera access using OpenCV

问题描述

下面给出的代码用于使用OpenCV访问Axis IP摄像机.在运行程序时，它首先显示打开cap_ffmpeg_impl ...时出错"，然后显示找不到摄像机.

The code given below is for accessing an Axis IP camera using OpenCV. On running the program it first displays "Error in opening cap_ffmpeg_impl..." and then it displays Camera not found.

#include <opencv\cv.h>
#include <opencv2\highgui\highgui.hpp>
#include <opencv2\imgproc\imgproc.hpp>
#include <iostream>
#include <stdio.h>

using namespace std;
using namespace cv;

int main()
{
    Mat frame;
    namedWindow("video", 1);
    VideoCapture cap("http://IPADDRESS/video.mjpg");
    if(!cap.isOpened())
    {
        cout<<"Camera not found"<<endl;
        getchar();
        return -1;
    }
    while ( cap.isOpened() )
    {
        cap >> frame;
        if(frame.empty()) break;

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

我要去哪里错了?

推荐答案

当尝试使用公共IP摄像机显示IP摄像机时，我遇到了类似的问题. Opencv需要一些典型的URL来打开相机，请尝试以下代码中的URL. 这是对我有用的代码.

I faced similar problem when trying to display IP camera using the public IP camera. Opencv needs some typical kind of URL to open the camera.Try the URL from below code. Heres the code that worked for me.

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

    // This works on a D-Link CDS-932L
    const std::string videoStreamAddress = "http://ID:PASSWORD@IPADDRESS:PORTNO/mjpeg.cgi?user=ID&password=ID:PASSWORD&channel=0&.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;
    }   

}

按原样复制此代码，然后尝试.

Copy this code as it is and try.

#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <iostream>
int main(int, char**) {
    cv::VideoCapture vcap;
    cv::Mat image;

    // This works on a D-Link CDS-932L

    const std::string videoStreamAddress = "http://USER:PWD@IPADDRESS:8088/mjpeg.cgi?user=USERNAME&password=PWD&channel=0&.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;
    }   

}

这篇关于使用OpenCV访问IP摄像机的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！