Duration
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The Duration attribute contains the playing duration of the file, in 100-nanosecond units.
Global Constant
g_wszWMDuration
Data Type
WMT_TYPE_QWORD
Remarks
This is a coded attribute.
This attribute cannot be duplicated at the file level. If this attribute is used for an individual stream, it will be treated as custom metadata and will not convey its normal meaning to the objects of the Windows Media Format SDK.
See also