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MF_PD_AUDIO_ISVARIABLEBITRATE attribute

Specifies whether the audio streams in a presentation have a variable bit rate.

Data type

UINT32

Get/set

To get this attribute, call IMFAttributes::GetUINT32.

To set this attribute, call IMFAttributes::SetUINT32.

Applies To

IMFPresentationDescriptor

Remarks

This is an optional attribute for presentation descriptors. If the attribute is TRUE (nonzero), the presentation contains at least one variable-bit-rate (VBR) audio stream. If the attribute is FALSE, all of the audio streams have a constant bit rate.

The GUID constant for this attribute is exported from mfuuid.lib.

Requirements

Minimum supported client

Windows 7 [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2008 R2 [desktop apps | Windows Store apps]

Header

Mfidl.h

See also

Alphabetical List of Media Foundation Attributes
Presentation Descriptor Attributes

 

 

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