AVI2BMP

• Download source files - 6 Kb
• Download demo project - 3 Kb

Introduction

This is a very small console program to convert video in AVI format into BMP file or files. I guess that's all that I can tell about this program. Oh, once more. I use some pragma directives to reduce the size of a program. That's all.

Using the code

OK! In my program I use standart way to extract one frame from AVI file and save it into BMP file. There's nothing special or secret in it. Just standard Win32 API and VFW API. That's all!

// Some steps:

  char   AVIFileName[_SIZE]={0};
 AVIFILE   aviFile;
 PAVISTREAM  aviStream;
 AVISTREAMINFO  aviStreamInfo;

 AVIFileInit();
 AVIFileOpen(&aviFile,AVIFileName,OF_READ,NULL);
 AVIFileGetStream(aviFile,&aviStream,streamtypeVIDEO,0);
 AVIFileRelease(aviFile);
 AVIStreamInfo(aviStream,&aviStreamInfo,sizeof(aviStreamInfo));

// OK! Now we can extract any frame from AVI stream!


 BITMAPFILEHEADER BMPFileHeader;
 LPBITMAPINFOHEADER lpbi;
 PGETFRAME  pgf;

 pgf=AVIStreamGetFrameOpen(aviStream,NULL); 
 lpbi=(LPBITMAPINFOHEADER)AVIStreamGetFrame(pgf,fr);
 BMPFileHeader.bfType=0x4d42;
 BMPFileHeader.bfSize=(DWORD)(sizeof(BITMAPFILEHEADER)+lpbi->biSize+
  lpbi->biClrUsed*sizeof(RGBQUAD)+lpbi->biSizeImage);
 BMPFileHeader.bfReserved1=0;
 BMPFileHeader.bfReserved2=0;
 BMPFileHeader.bfOffBits=(DWORD)sizeof(BITMAPFILEHEADER)+lpbi->biSize+
  lpbi->biClrUsed*sizeof(RGBQUAD);

// Than create file to save frame and write BMP sections into it!


 WriteFile(hFile,(LPVOID)&BMPFileHeader,sizeof(BITMAPFILEHEADER),
  (LPDWORD)&lpNumberOfBytesWritten,NULL);
 WriteFile(hFile,(LPVOID)lpbi,sizeof(BITMAPFILEHEADER)+lpbi->biSize+
  lpbi->biClrUsed*sizeof(RGBQUAD)+lpbi->biSizeImage,
  (LPDWORD)&lpNumberOfBytesWritten,NULL);

// And in the end make some clean!


 AVIStreamGetFrameClose(pgf);

// We can save one more frame or finish or work.


 AVIFileExit();

History

OK! I want to correct some error handlers, but may be next time.