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Specifies the desired quality level for quality based (1-pass) variable-bit-rate (VBR) encoding of audio streams.
Constant for IPropertyBag
Available only by using IPropertyStore.
Data Type
VT_UI4
Default Value
0
Remarks
This value can be from 0 to 100, where 100 is maximum quality. A value of 0 indicates that the quality-based VBR encoding method is not to be used.
To enumerate VBR modes that meet a certain quality requirement, set the following encoder properties.
- Set MFPKEY_VBRENABLED to VARIANT_TRUE.
- Set MFPKEY_CONSTRAIN_ENUMERATED_VBRQUALITY to VARIANT_TRUE.
- Set MFPKEY_DESIRED_VBRQUALITY to the desired quality. For Lossless modes, set the desired quality to 100.
Requirements
Minimum supported client |
Windows Vista |
Minimum supported server |
Windows Server 2008 |
Header |
Wmcodecdsp.h |
See Also
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Build date: 4/7/2010