IMediaSeeking::GetCapabilities method (strmif.h)

Article
07/27/2023

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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

The GetCapabilities method retrieves all the seeking capabilities of the stream.

Syntax

HRESULT GetCapabilities(
  [out] DWORD *pCapabilities
);

Parameters

[out] pCapabilities

Pointer to a variable that receives a bitwise combination of AM_SEEKING_SEEKING_CAPABILITIES flags.

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
S_OK	Success.
E_POINTER	NULL pointer argument.

Remarks

This method returns information on all the seeking capabilities of the stream. Examine pCapabilities by performing a separate bitwise-AND operation on each AM_SEEKING_SEEKING_CAPABILITIES value you are interested in.

C++
DWORD dwCaps = 0; pMediaSeeking->GetCapabilities(&dwCaps); if (dwCaps & AM_SEEKING_CanGetCurrentPos) { // The stream can seek to the current position. } if (dwCaps & AM_SEEKING_CanPlayBackwards) { // The stream can play backward. }

C++

DWORD dwCaps = 0;
pMediaSeeking->GetCapabilities(&dwCaps);
if (dwCaps & AM_SEEKING_CanGetCurrentPos)
{
// The stream can seek to the current position.
}
if (dwCaps & AM_SEEKING_CanPlayBackwards)
{
// The stream can play backward.
}

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib