C++:打开视频文件最简单的库是什么

I've pasted a part of my code (mainly a modified copy/paste from the msdn example), unfortunately it doesn't grabb the 25 first frames as expected...

[...]

hr = pGrabber->SetOneShot(TRUE);
hr = pGrabber->SetBufferSamples(TRUE);

pControl->Run(); // Run the graph.
pEvent->WaitForCompletion(INFINITE, &evCode); // Wait till it's done.

// Find the required buffer size.
long cbBuffer = 0;
hr = pGrabber->GetCurrentBuffer(&cbBuffer, NULL);

for( int i = 0 ; i < 25 ; ++i )
{
    pControl->Run(); // Run the graph.
    pEvent->WaitForCompletion(INFINITE, &evCode); // Wait till it's done.

    char *pBuffer = new char[cbBuffer];
    hr = pGrabber->GetCurrentBuffer(&cbBuffer, (long*)pBuffer);

    AM_MEDIA_TYPE mt;
    hr = pGrabber->GetConnectedMediaType(&mt);
    VIDEOINFOHEADER *pVih;
    pVih = (VIDEOINFOHEADER*)mt.pbFormat;

    [...]
}

[...]

有没有人，有视频软件经验，谁能给我建议代码或其他更简单的库?