| Microsoft DirectX 8.1 (C++) |
The get_FrameRate method retrieves the frame rate of the current stream. The stream must be a video stream.
Syntax
HRESULT get_FrameRate(
double *pVal
);
Parameters
pVal
[out, retval] Pointer to a variable that receives the frame rate, in frames per second.
Return Value
Returns an HRESULT value. Possible values include the following:
| Value | Description |
| S_FALSE | Video format header does not specify a frame rate. |
| S_OK | Success. |
| E_INVALIDARG | Invalid argument. |
| E_POINTER | NULL pointer argument. |
| VFW_E_INVALIDMEDIATYPE | Invalid media type. |
Remarks
This method cannot retrieve the frame rate from an ASF file.
Before calling this method, set the file name and stream by calling IMediaDet::put_Filename and IMediaDet::put_CurrentStream.
If the media detector is in bitmap grab mode, this method returns E_INVALIDARG. For more information, see IMediaDet::EnterBitmapGrabMode.
See Also