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。