IMVSCMediaSeeking

The IMVSCMediaSeeking Interface from the MontiVision Smart Control provides methods to control media file play back. It allows to move into the media file and to change the play back rate. It is based on the IMediaSeeking Interface from DirectShow. The MV SeekingSlider Control uses this interface. All times are in 100 nanoseconds units.

Use the IMVSCMediaSeeking2 interface methods in Visual Basic application because Visual Basic doesn't support LONGLONG parameter in COM interface methods.

Methods:

Typelib: MV SmartControl

Method IMVSCMediaSeeking::GetCurrentPosition

Declaration: Function GetCurrentPosition As LONGLONG

Returns the current position within the media stream.

Prototype:

HRESULT GetCurrentPosition(LONGLONG* value);

Method IMVSCMediaSeeking::GetDuration

Declaration: Function GetDuration As LONGLONG  

Get the duration from the current media stream.

Prototype:

HRESULT GetDuration(LONGLONG* value);

Property IMVSCMediaSeeking::PlaybackRate

Declaration: Property Get/Put PlaybackRate As Double

Video playback rate.

Prototype:

HRESULT put_PlaybackRate(DOUBLE);
HRESULT get_PlaybackRate(DOUBLE*);

Property IMVSCMediaSeeking::SeekingAvailable

Declaration: Property Get SeekingAvailable As Boolean

Is media seeking available.

Prototype:

HRESULT put_SeekingAvailable(BOOL);
HRESULT get_SeekingAvailable(BOOL*);

Method IMVSCMediaSeeking::SetAbsolutePosition

Declaration: Sub SetAbsolutePosition(Position As LONGLONG )

Set the absolute position within the media stream.

Parameter:

Position

New absolute position.

Prototype:

HRESULT SetAbsolutePosition(LONGLONG Position);

Method IMVSCMediaSeeking::SetRelativePosition

Declaration: Sub SetRelativePosition(Position As LONGLONG )

Set the relative position within the media stream.

Parameter:

Position

New relative position.

Prototype:

HRESULT SetRelativePosition(LONGLONG Position);

Property IMVSCMediaSeeking::TimeFormat

Declaration: Property Get/Put TimeFormat As Long

Current media time format.

Time Format	Value	Description
MVSC_TIMEFORMAT_TIME	1	Values in 100 ns units or seconds.
MVSC_TIMEFORMAT_FRAME	2	Values in video frames units.

Prototype:

HRESULT put_TimeFormat(LONG);
HRESULT get_TimeFormat(LONG*);