MFPKEY_MOTIONSEARCHRANGE Property

發行項
04/12/2010

Specifies the range used in motion searches.

Constant for IPropertyBag

g_wszWMVCMotionSearchRange

Data Type

VT_I4

Default Value

Remarks

This property may be set to one of the following values. H denotes horizontal range and V denotes vertical range. All ranges are given in pixels.

Value	Range
0	+63.75/-64.0 H, +31.75/-32.0 V
1	+127.75/-128.0 H, +63.75/-64.0 V
2	+511.75/-512.0 H, +127.75/-128.0 V
3	+1023.75/-1024.0 H, +255.75/-256.0 V
-1	Macroblock-adaptive (automatic)

This property controls the size of the frame area that the codec will search for an element that may have exhibited motion between frames. A larger search window will help find faster motion but will require more CPU time. The CPU requirements are approximately doubled at each level.

The automatic mode (-1) will dynamically select the most efficient mode.

Requirements

Minimum supported client	Windows XP
Minimum supported server	Windows Server 2003
Header	Wmcodecdsp.h

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