IltmmCapture::put_Volume

Summary

Sets the volume level of the audio stream of the preview output.

Syntax

#include "ltmm.h"

Language Syntax
C HRESULT IltmmCapture_put_Volume(pCapture, Volume)
C++ HRESULT put_Volume(Volume)

Parameters

IltmmCapture *pCapture

Pointer to an IltmmCapture interface.

long Volume

Volume level to set. Possible values range from -10000 to 0.

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 DirectShow documentation.

Comments

Full volume is 0, and -10,000 is silence. The scale is logarithmic. Multiply the desired decible level by 100 to get the value for newVal. For example, if you want a volume of -100 dB, set newVal to be -100 X 100 (that is, -10000).

The property only applies to the preview output. The audio stream in the captured content is not affected.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Functions

Topics

Example

Language Example
C IltmmCapture::IsPreviewTapSupported
C++ IltmmCapture::IsPreviewTapSupported
Help Version 22.0.2023.1.26
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LEADTOOLS Multimedia C API Help

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.