how sent a live stream(UDP) of frames captured by opencv

edit

i created these programs as client and server for broadcasting(UDP) of frames. i got error as segmentation error while running client. code for client

//basic
#include <iostream>
#include <stdio.h>
#include<string.h>
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<errno.h>
#include<string.h>
//opencv libraries
#include "opencv2/objdetect.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/imgproc.hpp"
//socket libraries
#include<sys/types.h> 
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<netdb.h>
#define SERVERPORT "4950"   // the port users will be connecting to


using namespace std;
using namespace cv;

void detectAndDisplay( Mat frame , Mat frame_edit);// function for detecting face
int talker(Mat frame);
/** Global variables */
String face_cascade_name = "lbpcascade_frontalface.xml";
String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";
CascadeClassifier face_cascade;
CascadeClassifier eyes_cascade;


/** @function main */
int main( void ) 
{
//body for image capture from camera 
 .
 .
 .
    //calling face detect function
detectAndDisplay( frame_edit, frame );
    int c = waitKey(5);
    if( (char)c == 27 ) { break; } // escape
}
return 0;
}

/**
 * @function detectAndDisplay
 */
 void detectAndDisplay( Mat frame ,Mat frame_edit)
{
// function body for detecting face
    .

imshow( "face detection client", frame );

    //calling talker to sent the data..
int ret=talker(frame);

if(ret==1||ret==2)
{
    cout<<"error";
    exit(1);
}   
}

int talker(Mat frame)

{
int sockfd;
const char *argv[1]={"localhost"};
struct addrinfo hints, *servinfo, *p;
int rv;
int numbytes;
frame = (frame.reshape(0,1)); // to make it continuous
int  imgSize = frame.total()*frame.elemSize();  
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;

if ((rv = getaddrinfo(argv[1], SERVERPORT, &hints, &servinfo)) != 0) 
{
    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
    return 1;
}
    // loop through all the results and make a socket

for(p = servinfo; p != NULL; p = p->ai_next) 
{
    if ((sockfd = socket(p->ai_family, p->ai_socktype,p->ai_protocol)) == -1) 
    {
        perror("talker: socket");
        continue;
    }
break;
}
if (p == NULL)
{
    fprintf(stderr, "talker: failed to bind socket\n");
    return 2;
}
if ((numbytes = sendto(sockfd, frame.data, imgSize, 0,p->ai_addr, p->ai_addrlen)) == -1)
{
    perror("talker: sendto");
    exit(1);
}
freeaddrinfo(servinfo);
cout<<"senting frame succesfull"<<endl;
close(sockfd);
return 0;
}