Raspicam dont work at 90fps - Raspberry Pi Forums

i have preferred using raspicam since promised work @ 90fps.

first of all, c++ did not recognize raspicam when plugged in. needed use library below work raspicam (and opencv).
http://www.uco.es/investiga/grupos/ava/node/40

however, no matter do, raspicam fails provide 90fps. instead, stucks somewhere around 30fps @ 640x480 grayscale image. why that? please me through annoying performance issue.

below test code used:

#include <ctime>
#include <iostream>
#include <raspicam/raspicam_cv.h>
using namespace std;

int main ( int argc,char **argv ) {

time_t timer_begin,timer_end;
raspicam::raspicam_cv camera;
cv::mat image;
int ncount=100;
//set camera params
camera.set( cv_cap_prop_format, cv_8uc1 );
camera.set( cv_cap_prop_frame_width, 640 );
camera.set( cv_cap_prop_frame_height, 480 );
camera.set( cv_cap_prop_fps, 90 );
//open camera
cout<<"opening camera..."<<endl;
if (!camera.open()) {cerr<<"error opening camera"<<endl;return -1;}
//start capture
cout<<"capturing "<<ncount<<" frames ...."<<endl;
time ( &timer_begin );
( int i=0; i<ncount; i++ ) {
camera.grab();
camera.retrieve ( image);
if ( i%5==0 ) cout<<"\r captured "<<i<<" images"<<std::flush;
}
cout<<"stop camera..."<<endl;
camera.release();
//show time statistics
time ( &timer_end ); /* current time; same as: timer = time(null) */
double secondselapsed = difftime ( timer_end,timer_begin );
cout<< secondselapsed<<" seconds "<< ncount<<" frames : fps = "<< ( float ) ( ( float ) ( ncount ) /secondselapsed ) <<endl;
//save image
cv::imwrite("raspicam_cv_image.jpg",image);
cout<<"image saved @ raspicam_cv_image.jpg"<<endl;
}

don't blame platform choice of software.

raspicam library source @ https://sourceforge.net/projects/raspic ... p/download not support cv_cap_prop_fps, deliver 30fps.

whilst may not official version, appears have been forked github , has been updated more there (and easier link to).
in there you'll see
https://github.com/cedricve/raspicam/bl ... cv.cpp#l96

code: select all

        case cv_cap_prop_fps:             return 30;

, no set method it. , @ https://github.com/cedricve/raspicam/bl ... pl.cpp#l71

code: select all

 state.framerate = 30;

, nothing further modifies framerate, used set frame rate on camera.

you'll either need make modifications raspicam, or alternatives.

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