xvattr man page

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

Author

Bjoern Englund. Send bug reports to "d4bjorn@dtek.chalmers.se" "rocky@panix.com" turned the README into this document.

See Also

See also xvinfo and XvQueryAdaptors, XvSetPortAttribute, and XvGetPortAttribute.

Info

2016-02-05 perl v5.22.1 User Commands