Brain Imaging & Analysis Center

Showplay allows you to grab images of what is on the screen (screenshots) while running a paradigm. There are 3 ways to save screenshots:

• save an image every X milliseconds (you specify how often X is)
• save an image whenever the display has changed
• save an image whenever you press <Control>-W on the keyboard

In order to save screenshots you should do the following:

• In the Showplay menu, select “Save screen shots” to display a dialog box
• In the “Setscreenshots” dialog box, specify your options (see below)
• In the Showplay menu, load and run your Showplay task file
• Verify that screenshots have been written to JPEG files

The SetScreenShots dialog box lets you specify screenshot parameters. You must enter values for:

• FilenamePrefix - Saved screenshots will have this name, followed by image number and .jpg
• FramePixels NX x NY - Width and height of images to be saved (do not exceed screen dimensions)
• Position X0,Y0 - Screen coordinate for upper-left corner of saved region, or -1 to save center of screen
• MaxNumImages - The maximum number of screenshots to save (actual number may be less)

By default, images will be taken from the center of the screen only when you press <Control>-W.
To save screenshots automatically you can click the options:

• On Video Change - to save a screenshot whenever the screen changes (text or images)
• Fixed Interval - to save every Interval milliseconds (you must also specify the interval)

Note: If FileNamePrefix includes a folder name, the specified folder must already exist.

See Also:
ShowPlay Tutorial, ShowPlay Home, ShowPlay Manual, CIGAL Home, CIGAL Manual,