VC6.0 如何用VFW录制avi

在.h头文件

 

#include "vfw.h"
#include "mmsystem.h"
#pragma comment (lib,"vfw32.lib")
#pragma comment (lib,"winmm.lib")

 

 

 

全局变量

 

int        nFrames = 0;
PAVIFILE pfile;
AVISTREAMINFO strhdr;
PAVISTREAM ps;
HRESULT hr; 
AVICOMPRESSOPTIONS pCompressOption;   
AVICOMPRESSOPTIONS FAR * opts[1] = {&pCompressOption};
PAVISTREAM pComStream;

 

 

 

这里就不说如何用dib截屏了

 

BITMAPINFOHEADER *pBInfo = new BITMAPINFOHEADER;
 pBInfo->biBitCount       = 24;
 pBInfo->biClrImportant   = 0;
 pBInfo->biCompression    = 0;
 pBInfo->biHeight         = DIBitmap.bmHeight;
 pBInfo->biPlanes         = DIBitmap.bmPlanes;
 pBInfo->biSize           = sizeof(BITMAPINFOHEADER);
 pBInfo->biSizeImage      = DIBitmap.bmWidthBytes * DIBitmap.bmHeight;
 pBInfo->biWidth          = DIBitmap.bmWidth;
 pBInfo->biXPelsPerMeter  = 0;
 pBInfo->biYPelsPerMeter  = 0;
if(nFrames == 0)
    {
        AVIFileInit();

        AVIFileOpen(&pfile,"录像.avi",OF_WRITE | OF_CREATE,NULL);
        memset(&strhdr, 0, sizeof(strhdr));
        strhdr.fccType    = streamtypeVIDEO;
        strhdr.fccHandler = 0;
        strhdr.dwScale    = 1;
        strhdr.dwRate     = 5;
        strhdr.dwSuggestedBufferSize = pBInfo->biSizeImage;
        SetRect(&strhdr.rcFrame,0,0,pBInfo->biWidth,pBInfo->biHeight);
        hr = AVIFileCreateStream(pfile,&ps,&strhdr); 
        
        opts[0]->fccType = streamtypeVIDEO;
        opts[0]->fccHandler = mmioStringToFOURCC("MSVC", 0);
        opts[0]->dwQuality = 7500;
        opts[0]->dwBytesPerSecond = 0;
        opts[0]->dwFlags = AVICOMPRESSF_VALID || AVICOMPRESSF_KEYFRAMES;
        opts[0]->lpFormat = 0;
        opts[0]->cbFormat = 0;
        opts[0]->dwInterleaveEvery = 0;
        
        AVIMakeCompressedStream(&pComStream,ps,&pCompressOption,NULL); 
        AVIStreamSetFormat(pComStream,0,pBInfo,sizeof(BITMAPINFOHEADER));
    }
    
    hr = AVIStreamWrite(pComStream,nFrames ,1,(LPBYTE)p+54,
        pBInfo->biSizeImage,AVIIF_KEYFRAME,NULL,NULL);
    nFrames++;
    
    delete pBInfo ;

 

 

结束的函数中加入

 

    if (pComStream != 0)
        AVIStreamClose(pComStream);
    if (ps != 0)
        AVIStreamClose(ps);
    if(pfile != NULL)
        AVIFileRelease(pfile);
    AVIFileExit();