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MF_PD_ASF_METADATA_IS_VBR attribute

Specifies whether an Advanced Systems Format (ASF) file uses variable bit rate (VBR) encoding.

Data type

UINT32

Treat as a Boolean value.

Remarks

This attribute applies to presentation descriptors for ASF content. If the value is TRUE, the file was encoded using VBR. If the value is FALSE or the attribute is not present, the file does not use VBR encoding.

The IMFASFContentInfo::GeneratePresentationDescriptor method generates this attribute and sets it on the presentation descriptor.

Note  This attribute corresponds to the IsVBR attribute in the Windows Media Format SDK.

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Wmcontainer.h

See also

IMFAttributes::GetUINT32
IMFAttributes::SetUINT32
IMFPresentationDescriptor
Presentation Descriptor Attributes
ASF Header Object
Presentation Descriptors

 

 

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