vfeedback(6) XScreenSaver manual vfeedback(6) NAME vfeedback - Simulates video feedback. SYNOPSIS vfeedback [--display host:display.screen] [--visual visual] [--window] [--root] [--window-id number] [--tv-color number] [--tv-tint number] [--noise number] [--tv-brightness number] [--tv-contrast number] [--fps] DESCRIPTION Simulates video feedback: pointing a video camera at an NTSC television. OPTIONS --visual visual Specify which visual to use. Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual. --window Draw on a newly-created window. This is the default. --root Draw on the root window. --window-id number Draw on the specified window. --tv-color number Color Knob. 0 - 1000. Default: 70. --tv-tint number Tint Knob. 0 - 100. Default: 5. --noise number Analog noise. 0.0 - 0.2. Default: 0.02. --darken number Darken the looped image. 0.0 - 1.0. Default: 0.7. --tv-brightness number Brightness Knob. 0.0 - 100.0. Default: 3.0. --tv-contrast number Contrast Knob. 0 - 1500. Default: 1000. --fps | --no-fps Whether to show a frames-per-second display at the bottom of the screen. ENVIRONMENT DISPLAY to get the default host and display number. XENVIRONMENT to get the name of a resource file that overrides the global re- sources stored in the RESOURCE_MANAGER property. XSCREENSAVER_WINDOW The window ID to use with --root. SEE ALSO X(1), xscreensaver(1) COPYRIGHT Copyright (C) 2018 by Jamie Zawinski. Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission no- tice appear in supporting documentation. No representations are made about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty. AUTHOR Jamie Zawinski. X Version 11 6.15 (30-Mar-2026) vfeedback(6)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | SEE ALSO | COPYRIGHT | AUTHOR
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