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IAMVideoCompression::get_KeyFrameRate (Windows Embedded CE 6.0)

  • Article

1/6/2010

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
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