IMediaSeeking::SetTimeFormat 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetTimeFormat method sets the time format for subsequent seek operations.
Syntax
HRESULT SetTimeFormat(
[in] const GUID *pFormat
);
Parameters
[in] pFormat
Pointer to a GUID that specifies the time format. See Time Format GUIDs.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
Success. |
|
Invalid argument. |
|
Method is not supported. |
|
NULL pointer argument. |
|
Filter graph is not stopped. |
Remarks
This method specifies the time units used by other IMediaSeeking methods, such as IMediaSeeking::GetPositions and IMediaSeeking::SetPositions. Whenever you call one of these other methods, any parameters that express time values are given in units of the current time format.
The default time format is REFERENCE_TIME units (100 nanoseconds). Other time formats include frames, samples, and bytes. To determine if a given format is supported, call the IMediaSeeking::IsFormatSupported method. If a format is supported, you can switch to that format by calling SetTimeFormat. Only one time format is active at any one time.
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 |