bionic (8) v4l-conf.8.gz

NAME

       v4l-conf -  configure a video4linux driver

SYNOPSIS

       v4l-conf [ options ]

DESCRIPTION

       v4l-conf  is  a  small  helper  tool.   It figures out the video mode and framebuffer base address of the
       graphics board and configures a video4linux driver like bttv.  This is needed for drivers which  can  DMA
       the video over PCI directly into the video memory.

       Usually  it  is  not  required  to  use  v4l-conf  manually, xawtv(1) and fbtv(1) run it automatically at
       startup.  It might be useful for trouble-shooting.  v4l-conf must be installed suid-root.

       v4l-conf knows three ways to get the information:

        * Query the X-Server using the XF86 DGA extension.  This is  the  default  if  the  DISPLAY  environment
          variable is set.

        * Query the framebuffer driver.  This is the default if DISPLAY is not set.

        * Query the console driver.  This is used on mklinux only.

OPTIONS

       -h  Print a short description of all command line options.

       -q  Be quiet.

       -d dpy
           Use the X11 display dpy to get the parameters.

       -f  Use the framebuffer driver to get the parameters.

       -c device
           Set the video4linux device.

       -b n
           enforce n bpp color depth.  Works for switching between 15/16 and 24/32 bpp.

       -s n
           Shift the video display by n bytes.

       -a adr
           Set  framebuffer  address  to adr.  The value should be specified in hex.  This option is allowed for
           root only.  You can't overwrite the autodetected value, this switch  is  only  useful  if  autodetect
           doesn't  work  because  the  X-Server lacks DGA support.  You can put this into /etc/conf.modules, as
           "post-install bttv ..." for example.

       -p pitch
           Set framebuffer pitch to pitch bytes.  The value should be specified in  decimal.  Allowed  for  root
           only.

BUGS

       Hope  I  haven't  any  security flaws in there.  If you find one, drop me a note.  Mails with patches are
       preferred :-)

SEE ALSO

       xawtv(1), fbtv(1)

AUTHOR

       Gerd Knorr <kraxel@goldbach.in-berlin.de>

COPYRIGHT

       Copyright (C) 1997-99 Gerd Knorr <kraxel@goldbach.in-berlin.de>

       This program is free software; you can redistribute it and/or modify  it  under  the  terms  of  the  GNU
       General  Public License as published by the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY  WARRANTY;  without  even
       the  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
       License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not,  write
       to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

                                             (c) 1997-99 Gerd Knorr                                  v4l-conf(8)