cpospassthru-put-rate.md

description	ms.assetid	title	ms.topic	ms.date	topic_type	api_name	api_type	api_location	ms.custom
The put\_Rate method sets the playback rate. This method implements the IMediaPosition::put\_Rate method.	c077f344-de34-4f8a-8e08-6d7086a5a4f1	CPosPassThru.put_Rate method (Ctlutil.h)	reference	4/26/2023	APIRef kbSyntax	CPosPassThru.put_Rate	COM	Strmbase.lib Strmbase.dll Strmbasd.lib Strmbasd.dll	UpdateFrequency5

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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

The put_Rate method sets the playback rate. This method implements the IMediaPosition::put_Rate method.

Syntax

HRESULT put_Rate(
   double dRate
);

Parameters

dRate

Playback rate. Must not be zero.

Return value

Returns E_INVALIDARG if dRate is zero. Otherwise, returns the HRESULT value from the connected pin.

Remarks

Negative rates indicate reverse play. Not all media will support reverse play.

Requirements

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

See also

CPosPassThru Class