IAMVideoCompression::get_KeyFrameRate
A version of this page is also available for
4/8/2010
This method retrieves the current key-frame rate.
Syntax
get_KeyFrameRate(
long* pKeyFrameRate
);
Parameters
- pKeyFrameRate
[out] Pointer to a long variable that receives the current key-frame rate. If the value is negative, the filter will use the default key-frame rate. If the value is zero, only the first frame is a key frame.
Return Value
Returns an HRESULT value.
Remarks
The key-frame rate is the number of frames per key frame. For example, if the rate is 15, then a key frame occurs every 15 frames.
To determine if the filter supports this method, call the IAMVideoCompression::GetInfo method and check for the CompressionCaps_CanKeyFrame (see CompressionCaps) flag in the pCapabilities parameter. The GetInfo method also returns the default key-frame rate.
Requirements
| Windows Embedded CE | Windows Embedded CE 6.0 and later |
| Windows Mobile | Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment |
See Also
Reference
IAMVideoCompression Interface
IAMVideoCompression::put_KeyFrameRate
IAMVideoCompression::GetInfo
CompressionCaps