+
+Selection of random image files is done by running the
+.BR xscreensaver-getimage-file (1)
+program. Capture of video frames (if requested) is done by running the
+.BR xscreensaver-getimage-video (1)
+program. The options of whether to do video, and which directory to
+search for images, are specified in the \fI~/.xscreensaver\fP file.