freezeThe freeze command freezes video input or video output on a VCR or disables video acquisition to the frame buffer. Digital-video, video-overlay, and VCR devices recognize this command. wsprintf(lpstrCommand, "freeze %s %s %s", lpszDeviceID, lpszFreezeFlags,
lpszFlags); Parameters lpszDeviceID Identifier of an MCI device. This identifier or alias is assigned when the device is opened. lpszFreezeFlags Flag that identifies what to freeze. The following table lists device types that recognize the freeze command and the flags used by each type:
||Specifies the region that will be frozen. For video-overlay devices, this
region will have video acquisition disabled. For digital-video devices, the pixels
within the rectangle will have their lock mask bit turned on (unless the
"outside" flag is specified). The rectangle is relative to the video buffer origin
and is specified as X1 Y1 X2 Y2. The coordinates X1 Y1 specify the upper left corner of the rectangle, and the coordinates X2 Y2 specify the width and height.
||Freezes the first field. Field is assumed by default (if neither frame nor
field is specified).
||Freezes the entire frame, displaying both fields.
||Freezes the current frame of the input image, whether it is paused or running.
||Freezes the current frame of the output from the VCR. If the VCR is playing
when freeze is issued, the current frame is frozen and the VCR is paused. If the VCR is
paused when this command is issued, the current frame is frozen. The frozen
image remains on the output device until an unfreeze command is issued. If neither "input" nor "output" is specified, "output" is
||Indicates that the area outside the region specified using the "at" flag is
See Also capability, unfreeze
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