IMFPMediaPlayer::SetPosition method (mfplay.h)

Sets the playback position.

Syntax

HRESULT SetPosition(
  [in] REFGUID           guidPositionType,
  [in] const PROPVARIANT *pvPositionValue
);

Parameters

[in] guidPositionType

Unit of time for the playback position. The following value is defined.

[in] pvPositionValue

New playback position. The meaning and data type of this parameter are indicated by the guidPositionType parameter.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Remarks

If you call this method while playback is stopped, the new position takes effect after playback resumes.

This method completes asynchronously. When the operation completes, the application's IMFPMediaPlayerCallback::OnMediaPlayerEvent callback method is invoked. The event type is MFP_EVENT_TYPE_POSITION_SET.

If playback was started before SetPosition is called, playback resumes at the new position. If playback was paused, the video is refreshed to display the current frame at the new position.

If you make two consecutive calls to SetPosition with guidPositionType equal to MFP_POSITIONTYPE_100NS, and the second call is made before the first call has completed, the second call supersedes the first. The status code for the superseded call is set to S_FALSE in the event data for that call. This behavior prevents excessive latency from repeated calls to SetPosition, as each call may force the media source to perform a relatively lengthy seek operation.

Requirements

See also

IMFPMediaPlayer

Using MFPlay for Audio/Video Playback