IltmfPlay::put_Rate

Summary

Assigns the media playback rate.

Platform Syntax
C HRESULT IltmfPlay_put_Rate(pPlay, newVal)
C++ HRESULT put_Rate(newVal)

Parameters

IltmfPlay *pPlay

Pointer to an IltmfPlay interface.

DOUBLE newVal

Playback rate. Must not be zero.

Returns

Value Meaning
S_OK The function was successful.
<> S_OK An error occurred. Refer to the Error Codes or the HRESULT error codes in the MediaFoundation documentation.

Comments

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 are twice speed. For audio streams, changing the rate also changes the pitch.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Functions

Topics

Example

For a C++ example, refer to the Simple Media Player for C++.

Help Version 22.0.2022.6.24
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LEADTOOLS Media Foundation C API Help

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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.