IMediaPosition::put_Rate
| Microsoft DirectShow 9.0 |
IMediaPosition::put_Rate
The put_Rate method sets the playback rate.
Syntax
HRESULT put_Rate( double dRate );
Parameters
dRate
[in] Playback rate. Must not be zero.
Return Values
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
| S_OK | Success. |
| E_INVALIDARG | Invalid argument. |
| E_NOTIMPL | Not implemented. |
Remarks
The playback rate is expressed as a ratio of the normal speed. Thus, 1.0 is normal playback speed, 0.5 is half speed, and 2.0 is twice speed. For audio streams, changing the rate also changes the pitch.
For more information, see the remarks in IMediaSeeking::SetRate.
Requirements
Header: Declared in Control.h; include Dshow.h.
Library: Use Strmiids.lib.
See Also