BackVideo (Questionnaire Files)

QuickInfo

Display a video in the background as the current item is presented.

Value

By default, MediaLab will play any video file that is supported by the Windows Media Player. This typically includes .mpg, .avi, .asf, .wmv, .dat, and .mpv video formats. So long as your are not running MediaLab on Windows 95 or NT you may also take advantage of MediaLab's own enhanced video functionality by selecting this option on the Preferences menu. Doing so will allow you also present QuickTime (.mov) and Real (.ra, .rm) video formats providing that QuickTime and/or Real Player are also installed on your system.

Purpose

In questionnaires, all item types support backvideos except executables, DirectRT and Inquisit sessions. If you would like a video played in the background simply type in the name of the video file in this field.

Advanced Hints

You can specify the location of the backvideo in the same way as you do for a background image using the top and left parameter values.

By default, the backvideo will be centered on the screen and play at its encoded size. To specify the location of the backvideo, use the top and left parameters. For backvideos, place the parameters in parentheses after the file name. For example, myvideo.bmp (t50,l200) will place the backvideo 50 pixels from the top and 200 pixel from the left. To specify the size of the backvideo, use the width parameter. For example, myvideo.bmp (w300) will play the video at a resolution of 300 by its proportional height. See parameters for more details.