Question

我编写简单的应用程序并且有raspicam库的问题。我打开了simpletest_raspicamm.cpp：

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

int main ( int argc,char **argv ) {
    raspicam::RaspiCam Camera; //Cmaera object
    //Open camera 
    cout<<"Opening Camera..."<<endl;
    if ( !Camera.open()) {cerr<<"Error opening camera"<<endl;return -1;}
    //wait a while until camera stabilizes
    cout<<"Sleeping for 3 secs"<<endl;
   //capture
    Camera.grab();
   //allocate memory
    unsigned char *data=new unsigned char[  Camera.getImageTypeSize (        raspicam::RASPICAM_FORMAT_RGB )];
   //extract the image in rgb format
   Camera.retrieve ( data,raspicam::RASPICAM_FORMAT_RGB );//get camera image
   //save
   std::ofstream outFile ( "raspicam_image.ppm",std::ios::binary );
   outFile<<"P6\n"<<Camera.getWidth() <<" "<<Camera.getHeight() <<" 255\n";
   outFile.write ( ( char* ) data, Camera.getImageTypeSize ( raspicam::RASPICAM_FORMAT_RGB ) );
   cout<<"Image saved at raspicam_image.ppm"<<endl;
   //free resrources    
   delete data;
   return 0;

}

控制台让我回头： /home/pi/Desktop/raspicam-0.0.7/src/private/private_impl.cpp:171：Private_Impl :: retrieve类型不是RASPICAM_FORMAT_IGNORE，因为它应该是图像保存在raspicam_image.ppm

我使用raspicam 0.0.7我试图使用所有其他版本和nothings更改。我编译使用命令：

g++ -ggdb -o `basename server.cpp .cpp` server1.cpp -I/usr/local/include/ -     lraspicam -L/opt/vc/lib

我尝试过使用Camera.setFormat（raspicam :: RASPICAM_FORMAT_IGNORE）并且不知道如何修复它。我在raspberry pi 2上工作，但在rpi3上一切正常。

Answer 1

看来 retrieve() 的界面从 v0.0.5 according to the comments in the header file.
基本上这个参数现在没用了，可以总是设置为 RASPICAM_FORMAT_IGNORE，或者只是留空让 C++ 默认参数启动。你看到的警告基本上什么都不做，不会对性能。

现在可以通过 independent function

设置格式

void setFormat ( RASPICAM_FORMAT fmt );

Raspicam Camera.retrieve（）错误

1 个答案: