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] [-tv-color number]  [-tv-tint  number]  [-noise  number]  [-tv-
11       brightness number] [-tv-contrast number] [-fps]
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DESCRIPTION

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

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

50       DISPLAY to get the default host and display number.
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52       XENVIRONMENT
53               to  get  the  name of a resource file that overrides the global
54               resources stored in the RESOURCE_MANAGER property.
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SEE ALSO

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

69       Jamie Zawinski.
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73X Version 11              5.42-1.fc30.2 (03-Feb-2019)            vfeedback(6x)
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