NAME
zapping_setup_fb - prepares V4L/V4L2 driver for overlay
SYNOPSIS
zapping_setup_fb [-?, -h, --help, --usage] [-b, --bpp NUMBER]
[-c, --child] [-d, --device FILENAME]
[-D, --display NAME] [-f, --fd] [-q, --quiet]
[-S, --screen SCREEN NUMBER] [-v, --verbose]
[-V, --version]
DESCRIPTION
zapping_setup_fb is a small program to prepare Video For Linux (V4L) or
Video For Linux Two (V4L2) video capture drivers for video overlay. It
must be executed by pam(8) with root privileges, or owned by root with
the set-user-ID bit set (see chmod(1)). This manual page refers to
zapping_setup_fb version 0.13.
BACKGROUND
To enable video overlay V4L and V4L2 drivers need to know the screen
memory address. For security reasons only the system administrator can
program this address. zapping(1) delegates the task to this helper
application.
OPTIONS
-?, -h, --help, --usage
Prints usage information on stdout, then terminates the program.
-b, --bpp NUMBER
Color depth hint, the number of bits per pixel on the display in
question, either 24 or 32. Usually zapping_setup_fb can determine
this number automatically.
-c, --child
Zapping sets this flag when executing zapping_setup_fb as child
process to enable the output of localized error messages in UTF-8
encoding on stderr.
-d, --device FILENAME
The video capture device to open, by default /dev/video0.
-D, --display NAME
The X display to use. Defaults to the name defined by the DISPLAY
environment variable.
-f, --fd NUMBER
Zapping uses this option when executing zapping_setup_fb as child
process to access the video capture driver by this shared file
descriptor instead of opening the device file by name.
-q, --quiet
Decrements the verbosity level.
-S, --screen NUMBER
The X screen to use (Xinerama), defaults to 0.
-v, --verbose
Increments the verbosity level.
-V, --version
Prints the version of zapping_setup_fb on stdout, then terminates
the program.
BUGS
None known.
SEE ALSO
zapping(1), zapping_remote(1), pam(8)
AUTHORS
Zapping and zapping_setup_fb were written by Iñaki García Etxebarria,
Michael H. Schimek (mschimek@users.sourceforge.net) and many
contributors.
This manual page was written by Michael H. Schimek based on work by
Christian Marillat.
[FIXME: source] 05/23/2010