This is the command xvattr that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
xvattr - Query/Set X11 XVideo Setting(s)
SYNOPSIS
xvattr [options...]
This program is used for getting and setting X11 Xv attributes such as XV_BRIGHTNESS,
XV_CONTRAST, XV_SATURATION, XV_HUE, XV_COLORKEY, ...
For this program to work, you must have a version of X11 with the XVideo extension and a
graphics card that has Xv graphics acceleration.
Note: On some cards XV_BRIGHTNESS and XV_CONTRAST are not listed among the available
attributes, but they can still be set/changed.
OPTIONS
With no options, all parameters are displayed.
Long options are handled by GNU getopts and follow those rules. In particular, options
that are specified with a double dash (--) rather than a single dash (-), can be
abbreviated as long as they are unique. Long parameters that need a value specified may
have the parameter and the value separated with blank space or an optional equals sign
(and no intervening space).
For example the following are all equivalent:
xvattr -a XV_BRIGHTNESS xvattr --attribute XV_BRIGHTNESS xvattr --att XV_BRIGHTNESS xvattr
--att=XV_BRIGHTNESS
Example:
> xvattr
Adaptor: 0
Name: Matrox G-Series Backend Scaler
Port: 46
Name: XV_COLORKEY
Flags: XvGettable XvSettable
Min value: 0
Max value: 16777215
Current value: 66046
{-a | --attribute} attribute name
Show value of attribute attribute name
Example:
> xvattr -a XV_BRIGHTNESS
XV_BRIGHTNESS = 24
{-a | --attribute} attribute name [-v | --value] value
Set attribute attribute name to value value.
Example:
> xvattr -a XV_COLORKEY -v 10
XV_COLORKEY set to 10
{-p | --port} port number
Get the attribute on the specified port. If -p is not set, the first available port
is used.
Example:
> xvattr -p 66
Found Xv 2.2
Adaptor: 0
Name: SIS Video Overlay
Port: 66
Name: XV_COLORKEY
Flags: XvGettable XvSettable
Min value: 0
Max value: 16777215
Current value: 66046
Name: XV_BRIGHTNESS
Flags: XvGettable XvSettable
Min value: -128
Max value: 127
Current value: 0
Name: XV_CONTRAST
Flags: XvGettable XvSettable
Min value: 0
Max value: 255
Current value: 128
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