## MMPM/2 Device Driver Reference

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### VCAI_VALIDRECT (6Eh) - Validate Video Rectangle

Category:
VIDEO_IOCTL_CAT (140)
Function:
VCAI_VALIDRECT (6Eh)
Description:
Validate Video Rectangle

Select an item:

    Description
    Parameter Packet Format
    Data Packet Format

This IOCtl modifies the source X_Width and source Y_Height to a valid size determined by the destination rectangle information. This IOCtl compensates for video capture adapters that do not support scaling images from a given source destination rectangle. The media control driver uses this information to center the source rectangle on the area in the original source rectangle.