Knowledge Base Nr: 00164 aviread.cpp - http://www.swe-kaiser.de

Win32: einzelne Bilder aus AVI-Datei extrahieren und anzeigen

  
void CAvitestDlg::OnFilm()
{
    AVIFileInit();

    PAVIFILE avifile;
    PAVISTREAM pavi;

    int nErr = AVIFileOpen(&avifile, "c:/temp/lulli-5f.avi", OF_READ, NULL);

    nErr = AVIFileGetStream(avifile, &pavi,streamtypeVIDEO, 0);

    AVISTREAMINFO psi;
    nErr = AVIStreamInfo(pavi, &psi, sizeof(psi));
    //psi.rcFrame (right, button): grösse x,y
    //psi.dwStart, psi.dwLength frames

    static LONG s_lStart = 0;

    LONG lSamples = 1;
    BYTE* pBuffer = new BYTE[psi.dwSuggestedBufferSize];
    LONG lBytes;

    nErr = AVIStreamRead(pavi, s_lStart, lSamples, pBuffer, psi.dwSuggestedBufferSize, &lBytes, &lSamples);

    if (++s_lStart >= psi.dwLength)
        s_lStart = 0;

//bild ausgeben
    CImageSupport img;
    img.SetBuffer(pBuffer, psi.rcFrame.right, psi.rcFrame.bottom, 24);

    CWnd* pWnd = GetDlgItem(IDC_FRAME);
    img.ShowThumbnail(pWnd);
//

    delete[] pBuffer;

    AVIFileRelease(avifile);

    AVIFileExit();
}