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The following attributes apply to events.
| Attribute | Description |
|---|---|
| MF_EVENT_DO_THINNING | When a media source requests a new playback rate, specifies whether the source also requests thinning. |
| MF_EVENT_OUTPUT_NODE | Identifies the topology node for a stream sink. |
| MF_EVENT_PRESENTATION_TIME_OFFSET | Offset between the presentation time and the media source's time stamps. |
| MF_EVENT_SCRUBSAMPLE_TIME | Presentation time for a sample that was rendered while scrubbing. |
| MF_EVENT_SESSIONCAPS | Contains flags that define the capabilities of the Media Session, based on the current presentation. |
| MF_EVENT_SESSIONCAPS_DELTA | Contains flags that indicate which capabilities have changed in the Media Session, based on the current presentation. |
| MF_EVENT_SOURCE_ACTUAL_START | Contains the start time when a media source restarts from its current position. |
| MF_EVENT_SOURCE_CHARACTERISTICS | Specifies the current characteristics of the media source. |
| MF_EVENT_SOURCE_CHARACTERISTICS_OLD | Specifies the previous characteristics of the media source. |
| MF_EVENT_SOURCE_FAKE_START | Specifies whether the current segment topology is empty. |
| MF_EVENT_SOURCE_PROJECTSTART | Specifies the start time for a segment topology. |
| MF_EVENT_SOURCE_TOPOLOGY_CANCELED | Specifies whether the sequencer source canceled a topology. |
| MF_EVENT_START_PRESENTATION_TIME | The starting time for the presentation, in 100-nanosecond units, as measured by the presentation clock. |
| MF_EVENT_START_PRESENTATION_TIME_AT_OUTPUT | The presentation time at which the media sinks will render the first sample of the new topology. |
| MF_EVENT_TOPOLOGY_STATUS | Specifies the status of a topology during playback. |
| MF_SESSION_APPROX_EVENT_OCCURRENCE_TIME | The approximate time when the Media Session raised an event. |
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