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MF_EVENT_SOURCE_ACTUAL_START attribute

Contains the start time at which a media source restarts from its current position.

Data type

UINT64

Treat as a LONGLONG value.

Remarks

This attribute is used with the MESourceStarted event. The attribute is relevant when the event data is empty (VT_EMPTY), which indicates that the media source started from the current playback position. In that case, the MF_EVENT_SOURCE_ACTUAL_START attribute specifies the actual starting time. If the event data is VT_EMPTY and this attribute is not set, the starting time is assumed to be zero.

When the MESourceStarted event data contains the start time (VT_I8), this attribute should not be set.

This attribute is a signed value, although it is stored as a UINT64.

The GUID constant for this attribute is exported from mfuuid.lib.

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Mfapi.h

See also

Event Attributes
IMFAttributes::GetUINT64
IMFAttributes::SetUINT64

 

 

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