AVI 转 BMP 图片的 C++ 源码

    去年有个项目,要求将AVI转成BMP图片,实现有几个办法，其中一种就是利用MS的vfw32.lib来开发。还可以用DIRECTSHOW来开发,不过对于没学过DIRECTSHOW的朋友来说,相对就复杂了。以下是部分源码，给大家研究,最早我也是从清华的BBS上拿来的。不过如果真要掌握位图的相关知识,建议买本人民邮电出版的《VISUAL C++数字图像获取,处理与实践应用》一书,较全面地介绍了数字图像技术。

AfxGetApp()-〉DoWaitCursor(1);
      GetDlgItem(IDC_BUTTONOK)-〉EnableWindow(false);

        PAVIFILE  pfile;//Pointer  to  a  buffer  that  receives  the  new  IAVIFile  interface  pointer.
           AVIFILEINFO    pfi;
           PAVISTREAM    pavi;
           PGETFRAME  pgf;
           long  length,  start;

           //initializes  the  AVIFile  library,as AVIFileExit()。
           //Call  AVIFileInit()  before  using  any  other  AVIFile  functions
           AVIFileInit();
           AVIFileOpen(&pfile,m_avifile,OF_READ  |OF_SHARE_DENY_NONE,NULL);

           //obtains  information  about  an  AVI  file
           AVIFileInfo(pfile,&pfi,sizeof(AVIFILEINFO));
           AVIFileGetStream(pfile,&pavi,streamtypeVIDEO,0);
           length=AVIStreamLength(pavi);
           start=AVIStreamStart(pavi);

           AVISTREAMINFO  si;
           AVIStreamInfo(pavi,  &si,  sizeof(si));

           pgf  =  AVIStreamGetFrameOpen(pavi,  NULL);
           //GET FIRST BMP
           LPBITMAPINFOHEADER  bmp1;
           bmp1=  (LPBITMAPINFOHEADER)AVIStreamGetFrame(pgf,  0);
           CClientDC  dc(this);

           //DEFAUT HEAD
           BITMAPINFOHEADER  bmih;
           memset(&bmih,0,sizeof(BITMAPINFOHEADER));
           bmih.biBitCount=bmp1-〉biBitCount ;  //Modif by Deng
           bmih.biSize  =  sizeof(BITMAPINFOHEADER);

          bmih.biWidth  =  pfi.dwWidth;
          bmih.biHeight  =  pfi.dwHeight;
          bmih.biPlanes  =bmp1-〉biPlanes;  //Modif By Deng Chun Ling

           bmih.biCompression  =BI_RGB;
           bmih.biXPelsPerMeter  =  0;
           bmih.biYPelsPerMeter  =  0;

           BITMAPFILEHEADER  bmfh;
       bmfh.bfSize  =  sizeof(bmfh);
         //bmfh.bfSize=sizeof(bmp1);  //modi by deng chun ling
    bmfh.bfOffBits  =  sizeof(bmfh)  +  sizeof(bmih); //BITMAPINFOHEADER+BITMAPINFOHEADER
       bmfh.bfType  =  (int)’M’  *  256  +  ’B’;
      // bmfh.bfType=0x424D;
    bmfh.bfReserved1  =  0;
       bmfh.bfReserved2  =  0;

       BYTE  *lpbuffa=new BYTE[(((pfi.dwWidth*bmih.biBitCount)+31)/8)*pfi.dwHeight];

    BYTE*  lpbuff;

   m_editqty=pfi.dwLength;
   UpdateData(false);
//Limite to 100
//if  (pfi.dwLength〉100) pfi.dwLength=100;

    for(LONG  i=1;i〈(LONG)pfi.dwLength;i++)
    {
       lpbuff=lpbuffa;
       lpbuff=(BYTE  *)AVIStreamGetFrame(pgf,i);//
       lpbuff+=40;
       //TranslationDIB1(lpbuff,bmih.biWidth,bmih.biHeight,10,50);//平移function
       char  name1[100];
       strcpy(name1,m_target);//目的路徑
       TCHAR  name3[50];
       wsprintf(name3, TEXT(“Bitmap%5.5ld.bmp\0“),  long(i) );
       strcat(name1,name3);

       ////Write BMP File。
       CFile  ff(name1,  CFile::modeWrite    |  CFile::modeCreate);  //
       ff.Write(&bmfh,  sizeof(bmfh));//bmfh--〉ff
       ff.Write(&bmih,  40);
       ff.Write(lpbuff,(((pfi.dwWidth*bmih.biBitCount)+31)/8)*pfi.dwHeight);
       ff.Close();
       Sleep(10);
  }

      delete[] lpbuffa;   //delete block
      m_editw=i;
      UpdateData(false);

       //release file
       AVIStreamGetFrameClose(pgf);
       AVIFileRelease(pfile);

       //Use  the  AVIFileExit()  function  to  release  the  AVIFile  library
      //and  decrement  the  reference  count.同AVIFileInit()??。
       AVIFileExit();
       ReleaseDC(&dc);
       AfxGetApp()-〉DoWaitCursor(1);
       MessageBox(“CONVERT COMPLETED!“,“NOTE“,MB_ICONINFORMATION);
GetDlgItem(IDC_BUTTONOK)-〉EnableWindow(true);