CSourceSeeking.ConvertTimeFormat method

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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 ConvertTimeFormat method converts from one time format to another. This method implements the IMediaSeeking::ConvertTimeFormat method.

Syntax

HRESULT ConvertTimeFormat(
         LONGLONG *pTarget,
   const GUID     *pTargetFormat,
         LONGLONG Source,
   const GUID     *pSourceFormat
);

Parameters

pTarget: Pointer to a variable that receives the converted time.
pTargetFormat: Pointer to the GUID of the target format. If NULL, the current format is used. See Time Format GUIDs.
Source: Time value to be converted.
pSourceFormat: Pointer to the time format GUID of the format to convert. If NULL, the current format is used.

Return value

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

Return code	Description
S_OK	Success
E_INVALIDARG	Invalid argument
E_POINTER	NULL pointer argument

Remarks

The only time format supported by the base class is TIME_FORMAT_MEDIA_TIME (100-nanosecond units). This method returns E_INVALIDARG, except in the trivial case where pTargetFormat and pSourceFormat both specify TIME_FORMAT_MEDIA_TIME.

Requirements

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