How can I get frames from my webcam ?
How can I do that in C++ and Python?
How can I do that in C++ and Python?
C++:
#include "opencv2/opencv.hpp" using namespace cv; int main(int argc, char** argv) { VideoCapture cap; // open the default camera, use something different from 0 otherwise; // Check VideoCapture documentation. if(!cap.open(0)) return 0; for(;;) { Mat frame; cap >> frame; if( frame.empty() ) break; // end of video stream imshow("this is you, smile! :)", frame); if( waitKey(10) == 27 ) break; // stop capturing by pressing ESC } // the camera will be closed automatically upon exit // cap.close(); return 0; }
Can I get a code for the same in C language?
Something like this:
#include "cv.h" #include "highgui.h" int main(int argc, char** argv) { CvCapture* capture=0; IplImage* frame=0; capture = cvCaptureFromAVI("C:\\video.avi"); if( !capture ) throw "Error when reading steam_avi"; cvNamedWindow( "w", 1); for( ; ; ) { frame = cvQueryFrame( capture ); if(!frame) break; cvShowImage("w", frame); } cvWaitKey(0); cvDestroyWindow("w"); cvReleaseImage(&frame); }
Which version of openCV should I use for the C code mentioned above? I'm using Code Composer Studio v5.5 (CCS v5.5) as the IDE. So, what are the supporting files to be included before compiling the code. When I typed the above code in CCS, I got this error : could not open source file cv.h
If you want to get access to video camera, just use index of camera (0-based) instead of filename. Unfortunately I know nothing about CCS, you can try to use new headers:
#include "opencv2/opencv.hpp"
thanks worked for me ...i tried so hard and for hours. Problem was at line : if( waitKey(33) >= 0 ) break; // OpenCV book quotes it like this one
but your line is life saver
"if( waitKey(10) == 27 ) break; // stop capturing by pressing ESC " worked like charm
Regards ron
OpenCV 3.2 VStudio 2017 win10
Asked: 2012-06-01 09:30:37 -0600
Seen: 92,623 times
Last updated: Jan 21 '17
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