IMediaDet::EnterBitmapGrabMode method

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

Note

[Deprecated. This API may be removed from future releases of Windows.]

 

The EnterBitmapGrabMode method switches the media detector to bitmap grab mode and seeks the filter graph to a specified time.

Syntax

HRESULT EnterBitmapGrabMode(
   double StreamTime
);

Parameters

StreamTime

Time, in seconds, to which the graph seeks.

Return value

Returns an HRESULT value. Possible values include the following:

Return code	Description
S_OK	Success.
E_INVALIDARG	Invalid argument.
VFW_E_INVALIDMEDIATYPE	The source file does not have a video stream.
VFW_E_TIME_EXPIRED	Seek command timed out.

 

Remarks

Before calling this method, set the file name and stream by calling IMediaDet::put_Filename and IMediaDet::put_CurrentStream.

This method inserts the Sample Grabber filter into the filter graph. You can then call IMediaDet::GetSampleGrabber to obtain a pointer to the ISampleGrabber interface. Once the media detector enters bitmap grab mode, the various informational methods in IMediaDet do not work.

The IMediaDet::GetBitmapBits or IMediaDet::WriteBitmapBits methods also put the media detector into bitmap grab mode.

Note

The header file Qedit.h is not compatible with Direct3D headers later than version 7.

 

Note

To obtain Qedit.h, download the Microsoft Windows SDK Update for Windows Vista and .NET Framework 3.0. Qedit.h is not available in the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 Service Pack 1.

 

Requirements

Requirement	Value
Header	Qedit.h
Library	Strmiids.lib

See also

IMediaDet Interface

Error and Success Codes