## MMPM/2 Device Driver Reference

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### VCAI_FREEZE (74h) - Freeze the Image Digitizer

Category:
VIDEO_IOCTL_CAT (140)
Function:
VCAI_FREEZE (74h)
Description:
Freeze the Image Digitizer

Select an item:

    Description
    Parameter Packet Format
    Data Packet Format

This IOCtl tells the video device to freeze the current digitized image. This freezes the capture card digitizer to produce a stable image. However, it is typically very slow because the device might have to wait for one or more video field times to pass to make sure the digitizer has come to a complete stop.