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Sets the volume level of the audio stream of the preview output.
#include "ltmm.h"
| Language | Syntax |
|---|---|
| C | HRESULT IltmmCapture_put_Volume(pCapture, Volume) |
| C++ | HRESULT put_Volume(Volume) |
Pointer to an IltmmCapture interface.
Volume level to set. Possible values range from -10000 to 0.
| 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. |
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.
Win32, x64.
| Language | Example |
|---|---|
| C | IltmmCapture::IsPreviewTapSupported |
| C++ | IltmmCapture::IsPreviewTapSupported |
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