MFPKEY_ASFMEDIASINK_AUTOADJUST_BITRATE property
Specifies whether the ASF media sink automatically adjusts the bit rate.
Data type
PROPVARIANT type (vt)
PROPVARIANT member
VARIANT_BOOL
VT_BOOL
boolVal
Remarks
If the value of this property is VARIANT_TRUE, the ASF media sink automatically adjusts the bit rate of the ASF content in response to the characteristics of the streams being multiplexed.
This property affects how the ASF media sink behaves when a stream overflows the sink's "leaky bucket" parameters:
| Value | Behavior |
|---|---|
| VARIANT_TRUE | The ASF media sink automatically adjusts the bit rate of the ASF content in response to the characteristics of the streams being multiplexed. |
| VARIANT_FALSE | The ASF media sink uses the stream bit rate value provided by the application. |
The default value is VARIANT_FALSE.
Set this property when you configure the ASF media sink. The usage depends on which function you call to create the ASF media sink:
MFCreateASFMediaSink: Query the retrieved IMFMediaSink pointer for the IPropertyStore interface.
MFCreateASFMediaSinkActivate: Call IMFASFContentInfo::GetEncodingConfigurationPropertyStore on the IMFASFContentInfo pointer specified in the pContentInfo parameter.
Setting this property to VARIANT_TRUE causes the ASF media sink to set the MFASF_MULTIPLEXER_AUTOADJUST_BITRATE flag on the ASF multiplexer. See IMFASFMultiplexer::SetFlags.
For more information about the leaky bucket concept, see the topic "The Leaky Bucket Buffer Model" in the Windows Media Format SDK documentation.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2008 [desktop apps only] |
| Header |
|
See also
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