1vfeedback(6x)                 XScreenSaver manual                vfeedback(6x)
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NAME

6       vfeedback - Simulates video feedback.
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SYNOPSIS

9       vfeedback  [--display host:display.screen] [--visual visual] [--window]
10       [--root] [--window-id number] [--tv-color  number]  [--tv-tint  number]
11       [--noise   number]   [--tv-brightness  number]  [--tv-contrast  number]
12       [--fps]
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DESCRIPTION

15       Simulates video feedback: pointing a video camera at  an  NTSC  televi‐
16       sion.
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OPTIONS

19       --visual visual
20               Specify  which  visual  to use.  Legal values are the name of a
21               visual class, or the id number (decimal or hex) of  a  specific
22               visual.
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24       --window
25               Draw on a newly-created window.  This is the default.
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27       --root  Draw on the root window.
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29       --window-id number
30               Draw on the specified window.
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32       --tv-color number
33               Color Knob.  0 - 1000.   Default: 70.
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35       --tv-tint number
36               Tint Knob.  0 - 100.  Default: 5.
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38       --noise number
39               Analog noise.  0.0 - 0.2.  Default: 0.02.
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41       --darken number
42               Darken the looped image. 0.0 - 1.0.  Default: 0.7.
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44       --tv-brightness number
45               Brightness Knob.  0.0 - 100.0.     Default: 3.0.
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47       --tv-contrast number
48               Contrast Knob. 0 - 1500.  Default: 1000.
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50       --fps | --no-fps
51               Whether  to  show  a frames-per-second display at the bottom of
52               the screen.
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ENVIRONMENT

55       DISPLAY to get the default host and display number.
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57       XENVIRONMENT
58               to get the name of a resource file that  overrides  the  global
59               resources stored in the RESOURCE_MANAGER property.
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61       XSCREENSAVER_WINDOW
62               The window ID to use with --root.
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SEE ALSO

65       X(1), xscreensaver(1)
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68       Copyright  ©  2018 by Jamie Zawinski.  Permission to use, copy, modify,
69       distribute, and sell this software and its documentation for  any  pur‐
70       pose  is  hereby granted without fee, provided that the above copyright
71       notice appear in all copies and that both  that  copyright  notice  and
72       this  permission  notice appear in supporting documentation.  No repre‐
73       sentations are made about the suitability of this software for any pur‐
74       pose.  It is provided "as is" without express or implied warranty.
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AUTHOR

77       Jamie Zawinski.
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81X Version 11               6.08-1.fc38 (17-Oct-2023)             vfeedback(6x)
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