problem to execute on linux

[hossein]

hi,
i’m using visualgdb(trial) to build a program in visual studio for linux. i work with vs2010 and my remote machine is raspberry pi 2(raspbian installed). the program compiled built and linked successfully and i could run and debug it in vs2010. ​
the reason i decide to use visualgdb was to make executable application for linux. because i have never exprienced linux before. so i found the executable file that visualgdb produced on remote and try to run it and i got these errors:
​
/dev/video0 does not support memory mapping
munmap: Invalid argument​​​
unable to stop the stream .:bad file descriptor
highgui error: v4l: could not sync to video stream. inappropriate ioctl for device
segmentation​​​ fault

is there any solution?
the errors are the same for debug and release version
​​​​
and this is my code:

#include “opencv2/opencv.hpp”

using namespace cv;
using namespace std;

int main(int, char**)
{

VideoCapture cap(0); // open the default camera

if(!cap.isOpened())
{// check if we succeeded
cout<<“dashskgdklggkagdsa”;
waitKey(2000);
return -1;
}
double sec;
Mat edges;
Mat frame;
//vector<Vec4i> lines;
cap >> frame;
double test = cap.get(CV_CAP_PROP_FRAME_WIDTH);
cap.set(CV_CAP_PROP_FRAME_WIDTH,800);
cap.set(CV_CAP_PROP_FRAME_HEIGHT,600);

double fps;
namedWindow(“lines”,WINDOW_AUTOSIZE);
namedWindow(“orig”,WINDOW_AUTOSIZE);
for(;;)
{
cap >> frame; // get a new frame from camera
Mat gray(frame.rows,frame.cols,CV_8UC1);
//video.write(frame);
// imwrite(“test.bmp”,frame);
Mat r;

cvtColor(frame, gray, CV_BGR2GRAY);

imshow(“orig”, frame);
imshow(“lines”,gray);

if(waitKey(1)>0)
{
break;
}
}
return 0;
}​​​​

[ket]

Hi,

Are you running the executable on the same raspberry pi 2 device or on another rasperry pi or Linux remote machine?

As the executable was built for a rasperry pi 2 device running raspian other Linux machines have different hardware and libraries and then the program cannot run there.

[hossein]

sorry for late reply, my hardware wrecked due to sd card corruption and i was busy with that.

i succeeded to run the program, the problem solved when i ran it from command line(instead of clicking on it and choosing execute in terminal).

i added two more line to extract canny edges and that worked too. then i try to add trackbar to control canny parameters but i faced the same problem. it works nice in vs2010 in local computer but on the raspberry pi 2 i have this errors:

HIGHGUI ERROR: V4L: Property <unknown property string>(6) not supported by device

(lines:2929): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-label-select-on-focus after class was initialised
Segmentation fault

 

 

[hossein]

any idea?

is there anyone working with raspberry pi?

[support]

Hi,

It looks like some sort of an incompatibility problem between your device and your toolchain. Please double-check the following:

• Ensure that your toolchain is compatible with the image version on your Raspberry Pi
• Ensure that you have re-synchronized the sysroot of your toolchain with the device

If nothing helps, please try compiling your program directly on Raspberry Pi and let us know if that works.

[Author]

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