MFPKEY_MOTIONSEARCHRANGE Property
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Specifies the range used in motion searches.
Constant for IPropertyBag
g_wszWMVCMotionSearchRange
Data Type
VT_I4
Default Value
0
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.
Applies To
This write-only property is available on the encoder of the following codecs:
- Windows Media Video 9 (main profile only)
- Windows Media Video 9 Advanced Profile
Requirements
Client: Requires Windows Vista or Windows XP.
Header: Include wmcodecdsp.h.
See Also