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.
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.
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2008 [desktop apps only]