DirectShow中VM9的创建与使用

1. Call CoCreateInstance to create the VMR-9:

   IBaseFilter *pVmr = NULL;
   hr = CoCreateInstance(CLSID_VideoMixingRenderer9, 0, 
       CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&pVmr);
   

2. Call IFilterGraph::AddFilter on the Filter Graph Manager to add the VMR-9 to the filter graph:

   hr = pGraph->AddFilter(pVmr, L"VMR9");
   

3. Call IGraphBuilder::AddSourceFilter to add a source filter for the video file:

   IBaseFilter *pSource;
   hr = pGraph->AddSourceFilter(L"C:\Example.avi", L"Source1", &pSource);
   

4. Call the ICaptureGraphBuilder2::RenderStream method to render the video stream to the VMR:

   hr = pBuild->RenderStream(0, 0, pSource, 0, pVmr);  
   

5. Optionally, call RenderStream again to render the audio stream:

   hr = pBuild->RenderStream(0, &MEDIATYPE_Audio, pSource, 0, NULL);

最后

以上就是耍酷早晨为你收集整理的DirectShow中VM9的创建与使用的全部内容，希望文章能够帮你解决DirectShow中VM9的创建与使用所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。