IAMTVTuner::get_VideoFrequency method (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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 get_VideoFrequency method retrieves the current video frequency.
Syntax
HRESULT get_VideoFrequency(
[out] long *lFreq
);
Parameters
[out] lFreq
Pointer to a variable that receives the video frequency, in hertz (Hz).
Return value
Returns an HRESULT value that depends on the implementation of the interface.
Remarks
This is a diagnostic method that enables you to examine the exact frequency being used for a given channel.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |