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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
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2008 [desktop apps only] |
| Header |
|
See also