vfeedback man page

vfeedback — Simulates video feedback.

Synopsis

vfeedback [-display host:display.screen] [-visual visual] [-window] [-root] [-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.

-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 resources stored in the RESOURCE_MANAGER property.

See Also

X(1), xscreensaver(1)

Author

Jamie Zawinski.

Info

5.42-1.fc30.1 (14-Jan-2019) X Version 11 XScreenSaver manual