别的文件都好着呢，为什么单单vob格式的文件两边都有黑边，不能改变显示的比例呢？？？

IBasicVideo * video = NULL;
m_pGraph->QueryInterface(IID_IBasicVideo, (void **)&video);
video->put_DestinationLeft(0);
video->put_DestinationTop(0);
video->put_DestinationHeight(rt.Height());
video->put_DestinationWidth (rt.Width());

也试过
m_pGraph->QueryInterface(IID_IVideoWindow, (void**)&pVidWin);
pVidWin->SetWindowPosition(0,0,rt.Width(),rt.Height());

都不行！

为什么别的格式(WMV )都是适应窗口播放呢???