Microsoft DirectX 8.1 (C++)

IAMTimeline Interface

The IAMTimeline interface provides methods for manipulating the timeline, the central object in Microsoft DirectShow Editing Services (DES). A timeline is a collection of time-ordered elements, such as video clips, audio clips, effects, and transitions between clips. The render engine uses the timeline to create a filter graph, from which the application can generate the rendered output.

IAMTimeline performs three basic services. It

Creates the objects in the timeline.
Acts as a container for those objects.
Sets and retrieves general parameters of the timeline.

Requirements

Requires Qedit.h.

In addition to the methods inherited from IUnknown, the IAMTimeline interface exposes the following methods.

Method	Description
AddGroup	Adds a group to the timeline.
ClearAllGroups	Removes all groups from the timeline, along with all objects contained in those groups.
CreateEmptyNode	Creates a new timeline object.
EffectsEnabled	Determines whether effects are enabled.
EnableEffects	Enables or disables all effects in the timeline.
EnableTransitions	Enables or disables all transitions in the timeline.
GetCountOfType	Retrieves the number of objects of the specified type that are contained in a specified group and all of its children.
GetDefaultEffect	Retrieves the default effect.
GetDefaultEffectB	Retrieves the default effect as a BSTR value.
GetDefaultFPS	Retrieves the default output frame rate, in frames per second.
GetDefaultTransition	Retrieves the default transition.
GetDefaultTransitionB	Retrieves the default transition as a BSTR value.
GetDirtyRange	Not supported.
GetDuration	Retrieves the timeline duration.
GetDuration2	Retrieves the timeline duration as a double.
GetGroup	Retrieves a specified group.
GetGroupCount	Retrieves the number of groups that are contained in the timeline.
GetInsertMode	Not supported.
IsDirty	Not supported.
RemGroupFromList	Not supported.
SetDefaultEffect	Sets the default effect.
SetDefaultEffectB	Sets the default effect as a BSTR value.
SetDefaultFPS	Sets the default output frame rate, in frames per second.
SetDefaultTransition	Sets the default transition.
SetDefaultTransitionB	Sets the default transition as a BSTR value.
SetInsertMode	Not implemented.
SetInterestRange	Not implemented.
TransitionsEnabled	Determines whether transitions are enabled.
ValidateSourceNames	Validates source names in the timeline.