IFilterGraph VS. IGraphBuilder

#IFilterGraph
# The IFilterGraph interface provides methods for building a filter graph



#IGraphBuilder
# IGraphBuilder inherited IFilterGraph
# IGraphBuilder adds further methods that construct graphs from partial information
# Ex. the IGraphBuilder::RenderFile method builds a graph for file playback, given the name of the file.
# Using these methods, an application does not need to specify every filter and pin connection in the graph. Instead, the Filter Graph Manager selects filters that are registered on the user's system, adds them to the graph, and connects them. For more information, see Intelligent Connect