#include "ltmm.h"
C Syntax |
HRESULT IltmmCapture_put_Volume(pCapture, Volume) |
C++ Syntax |
HRESULT put_Volume(Volume) |
IltmmCapture *pCapture; |
pointer to an interface |
long Volume; |
volume |
Sets the volume level of the audio stream of the preview output.
Parameter |
Description |
pCapture |
Pointer to an IltmmCapture interface. |
Volume |
Volume level to set. Possible values range from -10000 to 0. |
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. |
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
LTMM For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64
Elements: |
|
Topics: |
For a C example, refer to IltmmCapture::IsPreviewTapSupported Example for C.
For a C++ example, refer to IltmmCapture::IsPreviewTapSupported Example for C++.
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