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PC World 2004 February
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MediaGraph
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example_avi.mediagraph
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2002-12-29
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// This is a sample AVI Decoding Media Graph, it builds a decoding graph that looks like this:
//
// +-> [Indirectly Connect to the] -> Video Renderer
// File Source -> AVI Spliter -|
// +-> [Indirectly Connect to the] -> Audio Renderer
//
//
// The Functions:
//
// LoadFilter(FilterID,FilterName)
// - You can get the FilterID string by loading the filter in graph edit
// and saving the result to an XML file (File -> Save as XML). Make sure
// you copy it complete, along with the {} chars.
// The FilterName is a name you assign to the filter. I recommend using
// the name as it's listed by GraphEdit.
//
//
// SetFilterFileName(FilterName,FileName)
// - Use this function to set the file name the graph should load. The FileName
// should 99% of the time be set to "<FileName>" as this is the file selected by
// the user (see example below).
//
// ConnectPin(SourceFilterName,SourcePinName,DestinationFilterName,DestinationPinName)
// - The Source and Destination filter names are the names you used with the LoadFilter
// function. The Pin names can be found by viewing an XML exported filter graph
// using GraphEdit (note: the pin names as they appear within GraphEdit itself
// are incorrect!).
//
// IndirectConnectPin(SourceFilterName,SourcePinName,DestinationFilterName,DestinationPinName)
// - This function is similar to the ConnectPin function except that it allows you to
// connect pins with missing filters in between them. For example, you don't really know
// which Audio/Video Codec an AVI file uses, so ... By Indirectly connecting the AVI Splitter
// "Video->Out" pin with the Video Renderer filter "Video->In", the video codec is derived
// automatically.
//
// RenderPin(FilterName,PinName)
// - Same as right-clicking a pin in GraphEdit and selecting "Render", not recommended
// for use in Zoom Player.
//
// SetFilterSync(FilterName)
// - Using this function, you can set a specific filter as the filter that control the
// Audio/Video Synchronization. Not all filters can be set as the Sync filters. Usually
// the Audio filters are the ones in control of synchronization.
// Use this function as the last function in the graph.
//
// UseSystemClock
// - When used, a System Clock is created to maintain sync. This may cure some microstutter
// issues, but may lead to audio desync.
//
# Filters that are consistantly used in an AVI Media Graph
LoadFilter({E436EBB5-524F-11CE-9F53-0020AF0BA770},Source File)
LoadFilter({79376820-07D0-11CF-A24D-0020AFD79767},Default DirectSound Device)
LoadFilter({70E102B0-5556-11CE-97C0-00AA0055595A},Video Renderer)
LoadFilter({1B544C20-FD0B-11CE-8C63-00AA0044B51E},AVI Splitter)
# Assign the File Name into the File Source Filter
SetFilterFileName(Source File,<FileName>)
# Connect the file source filter (automatically loaded) to the AVI splitter
ConnectPin(Source File,Output,AVI Splitter,input pin)
# Connect the Video Stream Indirectly to the Video Renderer filter, thus automatically
# adding the Video Decoder codec into the Graph without actually knowing which codec it
# is (letting DirectShow detect and add the codec automatically).
IndirectConnectPin(AVI Splitter,Stream 00,Video Renderer,In)
# Connect the Audio Stream Indirectly to the Audio Renderer filter, thus automatically
# adding the Audio Decoder codec into the Graph without actually knowing which codec it
# is (letting DirectShow detect and add the codec automatically).
IndirectConnectPin(AVI Splitter,Stream 01,Default DirectSound Device,Audio Input pin (rendered))