IMultiMediaStream Interface

This interface provides methods that control a multimedia stream and provide access to its underlying media streams. A multimedia stream is the highest-level streaming object and can contain one or more media streams. While each media stream is media-type specific (audio, video, and so on), multimedia streams are generic across all types because they must provide access to a number of streams that can have different media types. IMultiMediaStream interface methods enable you to enumerate and retrieve pointers to the specific streams; IMediaStream interface methods provide specific control over the media stream behavior.

Implement this interface when you want to create containers for a specific type of media stream.

Use this interface when your application must enumerate and control a multimedia stream's underlying, type-specific streams.

Methods in Vtable Order

The following table shows the methods that appear in the Vtable beneath the standard COM methods inherited from IUnknown.

Method Description
GetInformation Retrieves the capabilities and stream type of a multimedia stream.
GetMediaStream Retrieves a media stream that has the specified purpose ID.
EnumMediaStreams Retrieves a media stream from a multimedia stream by zero-based index.
GetState Retrieves the multimedia stream's current state.
SetState Sets the media stream to either a running or stopped state.
GetTime Retrieves the current time from the multimedia stream's clock, if it has a clock.
GetDuration Retrieves the media stream's duration.
Seek Sets the seek location of all derived media streams to the specified time.
GetEndOfStreamEventHandle Retrieves the handle for the event triggered when the stream completes playback.


DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.

See Also

DirectShow Interfaces

Last updated on Wednesday, April 13, 2005

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