REFERENCE_TIME
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The REFERENCE_TIME data type defines the units for reference times in DirectShow. Each unit of reference time is 100 nanoseconds.
typedef LONGLONG REFERENCE_TIME;
Remarks
The REFERENCE_TIME data type is a 64-bit integer.
Reference times are usually measured from one of the following baselines:
- An absolute clock time. In this case, the baseline will depend on the implementation of the clock. For more information, see Reference Clocks.
- Relative to the start of playback.
For more information about reference times, see Time and Clocks in DirectShow.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
See also