hello,
I'm a newbie to opencv. I'm doing a project using c++ and I use opencv for image processing. So for that I need to capture two video streams at the same time. before doing processing part I try to display both videos from cameras on two windows. But it is not working. the massage on terminal is NO SPACE LEFT ON THE DEVICE. I search on web but couldn't find any helpful thing to get this done. So if anyone knows how to do this please help me.
here is my code that how I try to do it.
#include <stdio.h>
#include "cv.h"
#include "highgui.h"
#include "iostream"
#include <pthread.h>
#include <stdlib.h>
#define NUM_THREADS 2
using namespace std;
CvCapture* capture[2];
void *side_cam(void *z){
capture[0] = cvCreateCameraCapture(1);
capture[1] = cvCreateCameraCapture(0);
IplImage *img = 0;
IplImage *img1 = 0;
cvNamedWindow("Cam1",CV_WINDOW_AUTOSIZE);
cvNamedWindow("Cam2",CV_WINDOW_AUTOSIZE);
if(!capture[0] && !capture[1])
printf("Webcam error\n");
while(1){
img = cvQueryFrame(capture[0]);
img1 = cvQueryFrame(capture[1]);
if(!img)break;
if(!img1)break;
cvShowImage("Cam1",img);
cvShowImage("Cam2",img1);
char c = cvWaitKey(33);
if( c == 27 ) break;
}
cvReleaseImage(&img);
cvDestroyWindow("Cam1");
cvReleaseCapture(&capture[0]);
pthread_exit(0);
}
void *bottom_cam(void *z){
capture[1] = cvCreateCameraCapture(0);
IplImage *img1 = 0;
cvNamedWindow("Cam2",CV_WINDOW_AUTOSIZE);
if(!capture[1])
printf("Webcam error\n");
while(1){
img1 = cvQueryFrame(capture[2]);
if(!img1)break;
cvShowImage("Cam2",img1);
char c = cvWaitKey(33);
if( c == 27 ) break;
}
cvReleaseImage(&img1);
cvDestroyWindow("Cam1");
cvReleaseCapture(&capture[1]);
pthread_exit(0);
}
int main()
{
pthread_t threads[NUM_THREADS];
int rc;int z=0;
rc = pthread_create(&threads[0], NULL,side_cam, (void *)z);
if (rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);
}
rc = pthread_create(&threads[1], NULL,bottom_cam, (void *)z);
if (rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);
}
pthread_join(threads[0],NULL);
pthread_join(threads[1],NULL);
}thank you
