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CSourceSeeking.QueryPreferredFormat method

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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 QueryPreferredFormat method retrieves the object's preferred time format. This method implements the IMediaSeeking::QueryPreferredFormat method.

Syntax

HRESULT QueryPreferredFormat(
   GUID *pFormat
);

Parameters

pFormat

Pointer to a variable that receives a time format GUID. See Time Format GUIDs.

Return value

Returns one of the HRESULT values listed in the following table.

Return code Description
S_OK
 Success
E_POINTER
 NULL pointer value

Remarks

The only time format supported by the base class is TIME_FORMAT_MEDIA_TIME (100-nanosecond units).

Requirements

Requirement Value
Header
Ctlutil.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CSourceSeeking Class