ILMDmxSubtitle Interface

This is an interface, exposed by demultiplexers, that allows timed delivery of subtitle text.

For an overview of implementing the ILMDmxSubtitle interface, refer to Displaying Subtitles.

Properties

Type	Name	Description
ILMSubtitleTrackList	Tracks	A read-only property containing a list of all the tracks.
ILMSubtitleTrackList	TextTracks	A read-only property containing a list of all the text tracks.
ILMSubtitleTrackList	SelectedTracks	A read-only property containing a list of all the selected tracks. Selected tracks receive callback notifications.
ILMDmxSubtitleCallback	Callback	The user-specified callback interface that receives notifications.

Methods

HRESULT SelectTrack(LONG trackid, VARIANT_BOOL selected);

Description

Selects or deselects the specified track. Selected tracks receive callback notifications.

Parameters

trackid

A long value containing the track identifier.

selected

A VARIANT_BOOL value that indicates whether the track is selected or deselected. A value of VARIANT_TRUE selects the track. A value of VARIANT_FALSE deselects the track.

Return	Description
S_OK	Successful.
< 0	An error occurred.
E_INVALIDARG	The track is not in the Tracks list.