c++新手:int *a=new a[100];
怎么实现将视频中的图片存到a[]中?
怎么实现将视频中的图片存到a[]中?
解决方案
10
仅供参考:
#include <iostream>
#include <fstream>
#include <string>
#include <windows.h>
#include <gdiplus.h>
#pragma comment(lib, "gdiplus.lib")
using namespace std;
using namespace Gdiplus;
int main() {
GdiplusStartupInput gdiplusstartupinput;
ULONG_PTR gdiplustoken;
GdiplusStartup(&gdiplustoken, &gdiplusstartupinput, NULL);
wstring infilename(L"1.jpg");
string outfilename("color.txt");
Bitmap* bmp = new Bitmap(infilename.c_str());
UINT height = bmp->GetHeight();
UINT width = bmp->GetWidth();
cout << "width " << width << ", height " << height << endl;
Color color;
ofstream fout(outfilename.c_str());
for (UINT y = 0; y < height; y++)
for (UINT x = 0; x < width ; x++) {
bmp->GetPixel(x, y, &color);
fout << x << "," << y << ";"
<< (int)color.GetRed() << ","
<< (int)color.GetGreen() << ","
<< (int)color.GetBlue() << endl;
}
fout.close();
delete bmp;
GdiplusShutdown(gdiplustoken);
return 0;
}
10
new a[100]…… 这是啥意思?new int[100]?100这个数字哪里来的?
首先你需要一个视频解码器,能获取视频中的图像数据(分辨率、像素类型等),能把每一帧视频抽取出来。存储的话,可以考虑容器,而不是动态分配的赤裸裸的指针。