VMRFrequency structure (strmif.h)
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 VMRFrequency structure describes the frequency of a video stream. Frequencies are described as ratios. For example, the NTSC frame rate of 29.97 fps is expressed as 30,000:1001.
Syntax
typedef struct _VMRFrequency {
DWORD dwNumerator;
DWORD dwDenominator;
} VMRFrequency;
Members
dwNumerator
Numerator of the frequency ratio.
dwDenominator
Denominator of the frequency ratio.
Requirements
| Requirement | Value |
|---|---|
| Header | strmif.h (include Dshow.h) |