CSourcePosition::put_Rate
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4/8/2010
Sets the rate of playback relative to normal speed.
Syntax
HRESULT put_Rate(
double dRate
);
Parameters
- dRate
Rate to set.
Return Value
Returns an HRESULT value from the call to CSourcePosition::ChangeRate.
Remarks
This property allows an application to speed up or slow down playback relative to the normal default playback speed.
A rate of 1.0 indicates normal playback speed.
A rate of 2.0 causes playback at twice the normal rate: a video created for 10 frames per second (fps) will be played back at 20 fps, if resources permit.
Audio streams played back at above-normal speed increase the pitch rather than drop frames.
Negative rates indicate reverse play. Not all media will support reverse play.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |