How to play a media file with DirectShow

 Hello World in DirectShow Programming

Every directshow application must perform the following basic tasks.

1. Creates an instance of the FGM
2. Build a fliter graph using the FGM
3. controls the filter graph and responds to events

Following example code will give an insight into a simple directshow application, which uses the above mentioned tasks.

• Creating an instance of the FGM

IGraphBuilder Interface is used to create an instance of the FGM.

IGraphBuilder *pGraph;

CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC,

                    IID_IGraphBuilder, (void **)&pGraph);

• Building a filter graph with the FGM

IMediaControl Interface is used to handle the media stream in the filter graph

IMediaControl *pMediaControl;

• Run the filter graph using the FGM

RenderFile method is used to read the video stream into the filter.

Run method is used to run the media stream through the filter graph

pGraph->RenderFile(L"\\Hello_World.avi", NULL);

pMediaControl->Run();

The Full Source code sample is found on http://msdn.microsoft.com/en-us/library/aa916490.aspx