ASF Payload Extension GUIDs

The following GUIDs define payload extensions for Advanced Systems Format (ASF) streams.

Constant	Description
MFASFSampleExtension_SampleDuration	The data indicates the duration, in milliseconds, of the sample contained in the buffer object.
MFASFSampleExtension_OutputCleanPoint	The data indicates whether the sample is a key frame. A value of zero indicates that the sample is not a key frame. A nonzero value indicates that it is a key frame.
MFASFSampleExtension_SMPTE	The data is a SMPTE time code.
MFASFSampleExtension_FileName	The data in the sample extension specifies the name of the file from which the content in the sample was taken.
MFASFSampleExtension_ContentType	The data identifies the type of content that the sample contains.
MFASFSampleExtension_PixelAspectRatio	The data indicates the pixel aspect ratio of the content in the sample.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	Wmcontainer.h