IMFPMediaPlayer::GetPosition method (mfplay.h)

[The feature associated with this page, MFPlay, is a legacy feature. It has been superseded by MediaPlayer and IMFMediaEngine. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer and IMFMediaEngine instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Gets the current playback position.

Syntax

HRESULT GetPosition(
  [in]  REFGUID     guidPositionType,
  [out] PROPVARIANT *pvPositionValue
);

Parameters

[in] guidPositionType

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

[out] pvPositionValue

Pointer to a PROPVARIANT that receives the playback position.

Return value

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

Remarks

The playback position is calculated relative to the start time of the media item, which can be specified by calling IMFPMediaItem::SetStartStopPosition. For example, if you set the start time to 20 seconds and the source duration is 60 seconds, the range of values returned by GetPosition is 0–40 seconds.

Examples

The following code gets the current position, in 100-nanosecond units, as a LONGLONG value.

HRESULT GetPositionHNS(
    IMFPMediaPlayer *pPlayer, 
    LONGLONG *phnsPosition    // Receives the position in hns.
)
{
    HRESULT hr = S_OK;

    PROPVARIANT var;
    PropVariantInit(&var);

    *phnsPosition = 0;

    hr = pPlayer->GetPosition(MFP_POSITIONTYPE_100NS, &var);

    if (SUCCEEDED(hr))
    {
        *phnsPosition = var.hVal.QuadPart;
    }

    PropVariantClear(&var);
    return hr;
}

Requirements

See also

IMFPMediaPlayer

Using MFPlay for Audio/Video Playback