fbtv man page on aLinux

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fbtv(1)								       fbtv(1)

       fbtv - a console program for watching TV

       fbtv [ options ] [ station name ]

       fbtv  is a program for watching TV with your linux box.	It runs on top
       of a graphic framebuffer device (/dev/fb0).  You'll need	 a  new	 2.1.x
       kernel  to  play with this.  fbtv shares the config file ($HOME/.xawtv)
       with the xawtv application.  Check the  xawtv(1)	 manpage  for  details
       about the config file format.

       -o base
	      set basestring for the snapshot output files.  The filename will
	      be "base-timestamp-nr.ext".

       -v     Be verbose.

       -c device
	      video4linux device (default is /dev/video0).

       -d device
	      framebuffer device (default is $FRAMEBUFFER; /dev/fb0 if unset)

       -g     grayscaled display (works for 256 color mode only)

       -s widthxheight
	      display the TV picture in width x height size in the upper right

       -f font
	      font   for   text.   Default  is	to  look  for  lat1-16.psf  in
	      /usr/lib/kbd/consolefonts and /usr/share/consolefonts.   If  you
	      have a local X11 font server running (or the FONTSERVER environ‐
	      ment variable set to some working server), you can also give X11
	      font specs here.

       -m mode
	      video mode for TV.  fbtv will look up the mode in /etc/fb.modes.

       -j joydev
	      joystick device to use for controlling fbtv.

       -k     keep  capture  on	 when  switching  consoles.   Might  be useful
	      together with -s switch, you have a video picture while  working
	      on  another  console.  This is more or less a dirty hack.	 Works
	      only if all your consoles have the same  video  mode  and	 fbcon
	      does  not	 use panning to speed up scrolling.  For a multiheaded
	      setup this is useful too.

       -q     quiet mode.  Doesn't reserve space for the status	 line  at  the
	      top,  doesn't  display  the  status messages and clock.  You can
	      toggle this at runtime too ('F').

       -M     EXPERIMENTAL: Turn on backend scaler mode	 (write	 yuv  to  off‐
	      screen  memory  and let the gfx board scale up the video).  Sup‐
	      ported hardware: Matrox G200/G400 (with matroxfb) and ATI Mach64
	      VT/GT   (with   atyfb,   16bpp  only).   You'll  need  at	 least
	      bttv-0.7.16 or kernel 2.3.50.

       fbtv is supported to work much like xawtv from user's  point  of	 view.
       You  might  have	 noticed  that	xawtv has a lot of keyboard shortcuts.
       They work in fbtv too (if it useful).  Here is the list:

       G	    Grab picture (full size, ppm)
       J	    Grab picture (full size, jpeg)
       F	    Fullscreen.	 Toggle quiet mode (see above).

       up/down	    tune up/down one channel
       left/right   fine tuning
       pgup/pgdown  station up/down

       ESC,Q	    Quit
       X	    Quit, but leave sound on.

       +/-	    Volume up/down
       Enter	    mute

       The channel hotkeys defined in $HOME/.xawtv are supported too, with one
       exception: modifier keys (something like "key = Ctrl+F1") do not work.

       Some hints from Dag Bakke <dag.bakke@riksnett.no>:

       The  BT8xx  cards can produce images up to 768x576 pixels.  In order to
       have fbtv make use of your entire monitor-size and  get	maximum	 image
       quality,	 you  need to create a 768x576 pixels framebufferconsole. This
       can be accomplished with the fbset(1) utility, which is	availabile  at
       various locations.  See: http://www.cs.kuleuven.ac.be/~geert/bin/

       Or,  you	 can let fbtv handle the videomode changes with the -m switch.
       This requires that you have a small database with  the  various	video‐
       modes  availabile. The file containing the videomodes is normally named
       /etc/fb.modes.  For   example,	the   following	  entry	  produces   a
       768x576x32bpp mode, with 75Hz refresh on a Matrox G200.

       mode "tv"
	   # D: 49.188 MHz, H: 46.580 kHz, V: 75.008 Hz
	   geometry 768 576 768 576 32
	   timings 20330 128 32 32 8 128 5

       The command "fbtv -q -mtv" thus gives you crisp clear (well, as good as
       the received signal anyway) tv on your entire screen. Alias  this  com‐
       mand to 'tv', and you're set.

       NB!   Please  note  that	 your monitor may or may not be able to handle
       such a "custom" resolution. And that misuse of the aforementioned fbset
       utility can toast your monitor. It is a lot easier to pull smoke out of
       electronic components, than to put it back in.

       A  database  of	the  standard  VESA-modes  can	be  downloaded	 from:


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

       Copyright (C) 1997,98 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 MER‐
       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) 1998 Gerd Knorr		       fbtv(1)

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