未压缩的avi转bmp，bmp转avi两个实用函数

1. 从摄像头采集到视频数据保存为未压缩的avi硬盘文件，路线：capCreateCaptureWindow --> capDriverConnect --> capPreviewRate --> capFileSetCaptureFile。用上面任何一个函数名在网上搜索，可以找到很多视频采集的示例；

2. avi2bmp和bmp2avi

BOOL CMainFrame::AviToBmp(CString szAVIName, CString strBmpDir)   
{   
    // TODO: 在此添加控件通知处理程序代码   
    AVIFileInit();     //initializes the AVIFile library   
    PAVIFILE avi;   
    int res=AVIFileOpen(&avi, szAVIName, OF_READ, NULL);   
    int n = GetLastError();   
    if (res!=AVIERR_OK)   
    {   
        //an error occures   
        if (avi!=NULL)   
            AVIFileRelease(avi);   
        return FALSE;   
    }   
    AVIFILEINFO avi_info;    //structure contains global information for an entire AVI file.    
    AVIFileInfo(avi, &avi_info, sizeof(AVIFILEINFO));   
    PAVISTREAM pStream;   
    res=AVIFileGetStream(avi, &pStream, streamtypeVIDEO /*video stream*/,    
        0 /*first stream*/);   
    if (res!=AVIERR_OK)   
    {   
        if (pStream!=NULL)   
            AVIStreamRelease(pStream);   
        AVIFileExit();   
        return FALSE;   
    }   
       
    //do some task with the stream   
    int iNumFrames;   
    int iFirstFrame;   
    iFirstFrame=AVIStreamStart(pStream);   
    if (iFirstFrame==-1)   
    {   
        //Error getteing the frame inside the stream   
        if (pStream!=NULL)   
            AVIStreamRelease(pStream);   
        AVIFileExit();   
        return FALSE;   
    }   
    iNumFrames=AVIStreamLength(pStream);   
    if (iNumFrames==-1)   
    {   
        //Error getteing the number of frames inside the stream   
        if (pStream!=NULL)   
            AVIStreamRelease(pStream);   
        AVIFileExit();   
        return FALSE;   
    }   
       
    //getting bitmap from frame   
    BITMAPINFOHEADER bih;   
    //ZeroMemory(&bih, sizeof(BITMAPINFOHEADER));   //fills a block of memory with zeros   
       
    bih.biBitCount=24;    //24 bit per pixel   
    bih.biClrImportant=0;   
    bih.biClrUsed = 0;   
    bih.biCompression = BI_RGB;   
    bih.biPlanes = 1;   
    bih.biSize = sizeof(BITMAPINFOHEADER);   
    bih.biXPelsPerMeter = 0;   
    bih.biYPelsPerMeter = 0;   
    bih.biWidth=avi_info.dwWidth;   
    bih.biHeight=avi_info.dwHeight;   
    //calculate total size of RGBQUAD scanlines (DWORD aligned)   
    bih.biSizeImage =(((bih.biWidth * 3) + 3) & 0xFFFC) * bih.biHeight;   
       
    PGETFRAME pFrame;   
    pFrame=AVIStreamGetFrameOpen(pStream, NULL);   
       
    AVISTREAMINFO streaminfo;   
    AVIStreamInfo(pStream,&streaminfo,sizeof(AVISTREAMINFO));   
       
    //Get the first frame   
    //BITMAPINFOHEADER bih2;   
    long lsize = sizeof(bih);   
    int index=0;   
    for (int i=iFirstFrame; i<10; i++)   
    {   
        index= i-iFirstFrame;   
        BYTE* pDIB = (BYTE*) AVIStreamGetFrame(pFrame, index); //返回该帧的地址   
        //AVIStreamReadFormat(pStream,index,&bih,&lsize);   
        BITMAPFILEHEADER stFileHdr;   
           
           
        BYTE* Bits=new BYTE[bih.biSizeImage];   
        ZeroMemory(Bits,bih.biSizeImage);   
           
        memcpy(Bits,pDIB-1,bih.biSizeImage);   
        /*  
        for(int j=0;j<int(bih.biSizeImage);j++)  
        {  
            *(Bits+j)=*(pDIB+j+2);  
        }  
        if(!AVIStreamRead(pStream,index,bih.biWidth*bih.biHeight,&Bits,bih.biSizeImage,NULL,NULL))  
        {  
            MessageBox("Data read fail",NULL,MB_OK);  
        }*/   
        //RtlMoveMemory(Bits, pDIB + sizeof(BITMAPINFOHEADER), bih2.biSizeImage);   
           
        bih.biClrUsed =0;   
        stFileHdr.bfOffBits=sizeof(BITMAPFILEHEADER);//+sizeof(BITMAPINFOHEADER);   
        stFileHdr.bfSize=bih.biSizeImage+sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);   
        stFileHdr.bfType=0x4d42;    
        stFileHdr.bfReserved1=0;   
        stFileHdr.bfReserved2=0;   
           
        CString FileName;   
        FileName.Format("Frame-%05d.bmp", index);   
        CString strtemp = strBmpDir;   
        strtemp += "\\";   
        strtemp += FileName;   
        FILE* fp=_tfopen(strtemp ,_T("wb"));   
        fwrite(&stFileHdr,1,sizeof(BITMAPFILEHEADER),fp);   
        fwrite(&bih,1,sizeof(BITMAPINFOHEADER),fp);   
        int ff = fwrite(Bits,1,bih.biSizeImage,fp);   
        int e = GetLastError();   
        fclose(fp);   
        /////   
        delete Bits;   
        //CreateFromPackedDIBPointer(pDIB, index);   
    }   
       
    AVIStreamGetFrameClose(pFrame);   
       
    //close the stream after finishing the task   
    if (pStream!=NULL)   
        AVIStreamRelease(pStream);   
       
    AVIFileExit();   
    return TRUE;   
}   
   
BOOL CMainFrame::BmpToAvi(CString szAVIName, CString strBmpDir)   
{   
    CFileFind finder;   
    strBmpDir += _T("\\*.*");    
    AVIFileInit();      
    AVISTREAMINFO strhdr;   
    PAVIFILE pfile;   
    PAVISTREAM ps;    
    int nFrames =0;    
    HRESULT hr;    
       
    BOOL bFind = finder.FindFile(strBmpDir);   
    while(bFind)   
    {   
        bFind = finder.FindNextFile();   
        if(!finder.IsDots() && !finder.IsDirectory())   
        {   
            CString str = finder.GetFilePath();   
            FILE *fp = fopen(str,"rb");   
            BITMAPFILEHEADER bmpFileHdr;   
            BITMAPINFOHEADER bmpInfoHdr;   
            fseek( fp,0,SEEK_SET);   
            fread(&bmpFileHdr,sizeof(BITMAPFILEHEADER),1, fp);   
            fread(&bmpInfoHdr,sizeof(BITMAPINFOHEADER),1, fp);   
               
            BYTE *tmp_buf = NULL;   
            if(nFrames ==0 )   
            {   
                AVIFileOpen(&pfile,szAVIName,OF_WRITE | OF_CREATE,NULL);   
                memset(&strhdr, 0, sizeof(strhdr));   
                strhdr.fccType                = streamtypeVIDEO;// stream type   
                strhdr.fccHandler             = 0;   
                strhdr.dwScale                = 1;   
                strhdr.dwRate                 = 15;                 // 15 fps   
                strhdr.dwSuggestedBufferSize = bmpInfoHdr.biSizeImage ;   
                SetRect(&strhdr.rcFrame, 0, 0, bmpInfoHdr.biWidth, bmpInfoHdr.biHeight);   
                   
                // And create the stream;   
                hr = AVIFileCreateStream(pfile,&ps,&strhdr);            
                // hr = AVIStreamSetFormat(ps,nFrames,&bmpInfoHdr,sizeof(bmpInfoHdr));   
            }   
            tmp_buf = new BYTE[bmpInfoHdr.biWidth * bmpInfoHdr.biHeight * 3];   
            fread(tmp_buf, 1, bmpInfoHdr.biWidth * bmpInfoHdr.biHeight * 3, fp);   
            hr = AVIStreamSetFormat(ps,nFrames,&bmpInfoHdr,sizeof(bmpInfoHdr));   
            hr = AVIStreamWrite(ps,       // stream pointer   
                nFrames ,                          // time of this frame   
                1,                         // number to write   
                (LPBYTE) tmp_buf,   
                bmpInfoHdr.biSizeImage , // size of this frame   
                AVIIF_KEYFRAME,                    // flags....   
                NULL,   
                NULL);   
               
            nFrames ++;    
            fclose(fp);   
               
        }   
    }   
       
    AVIStreamClose(ps);   
       
    if(pfile != NULL)   
        AVIFileRelease(pfile);   
       
    AVIFileExit();   
    return TRUE;   
}