通过

MFPKEY_VBRQUALITY Property

  • 项目

Specifies the actual quality level for quality based (1-pass) variable-bit-rate (VBR) encoding.

Constant for IPropertyBag

g_wszWMVCVBRQuality, g_wszWMCPAudioVBRQuality

Data Type

VT_I4

Remarks

Not all of the values in the range have a unique meaning. The values that represent a step up in quality from the previous level are: 1, 4, 8, 11, 15, 18, 22, 25, 29, 33, 36, 40, 43, 47, 50, 54, 58, 61, 65, 68, 72, 75, 79, 83, 86, 90, 93, 97, and 100.

For audio encoder objects, the quality modes are provided in the WAVEFORMATEX structure of the output types that you retrieve using the IMediaObject::GetOutputType.

Requirements

Minimum supported client

 Windows Vista

Minimum supported server

 Windows Server 2008

Header

 Wmcodecdsp.h

See Also

Enumerating Audio Types for Specific Encoding Modes

Properties

 

 

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Build date: 4/7/2010