IAMTimelineSrc::GetDefaultFPS method
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]
Note
[Deprecated. This API may be removed from future releases of Windows.]
The GetDefaultFPS method retrieves the source object's default frame rate. The render engine uses this value if it cannot determine the frame rate from the original source.
Syntax
HRESULT GetDefaultFPS(
double *pFPS
);
Parameters
-
pFPS
-
Receives the default frame rate, in frames per second.
Return value
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Remarks
The default frame rate is not required if the file format specifies the frame rate. This is the case for audio and video formats.
If the source is a bitmap or JPEG image, the render engine uses it as the first image in a device-independent bitmap (DIB) sequence, with a frame rate equal to the default frame rate. To render a static image, rather than a DIB sequence, set the default frame rate to 0.
If the source is a GIF, do not set the frame rate. For animated GIFs, the GIF file specifies the delay between each image.
Note
The header file Qedit.h is not compatible with Direct3D headers later than version 7.
Note
To obtain Qedit.h, download the Microsoft Windows SDK Update for Windows Vista and .NET Framework 3.0. Qedit.h is not available in the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 Service Pack 1.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|
See also