Grave a programação da tv usando crontab/at e mplayer.
Após problemas com alguns aplicativos encontrei os parametros necessários para usar o mplayer e fazer minhas gravações.
Criei um script para fazer isto e conto com todos para aprimorar o script.
Agora com suporte a v4l e v4l2.

• Download mPlayRecTv
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Esconder código-fonte

#!/bin/bash

#name       : mPlayRecTv
#born       : 01-April-2005 (it is not lie)
#author     : Pedro Robson Leão (pedro.leao@ig.com.br)
#description: A simple interface to play and rec tv with mplayer.
#change log :
#20050401 ** first version.
#20050423    ajust para v4l2.

#mencoder -tv driver=v4l:norm=palm:channel=3:chanlist=us-cable:width=320:height=240:input=0 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=900      -oac mp3lame -lameopts cbr:br=64 -o output.avi tv://
#mplayer  -tv driver=v4l:norm=palm:channel=3:chanlist=us-cable:width=352:height=240:input=0 -vo sdl tv://

#-- default Parameters
driver=${driver:-v4l2};
norm=${norm:-palm};
channel=${channel:-3};
channelist=${channelist:-us-cable};
width=${width:-320};
height=${height:-240};
ovc=${ovc:-lavc -lavcopts};
vcodec=${vcodec:-mpeg4};
vbitrate=${vbitrate:-900};
oac=${oac:-mp3lame -lameopts};
cbr=${cbr:-br=64};
input=${input:-Television};
output=${output:-output.avi};
vo=${vo:-sdl};
log=${log:-/dev/null};
time=;
play=1;
myname=$0;

#-- convert hour and minuts to seconds
function convTime() {
   value=${1};
   value=${value//:/};
   min=$((value%100));
   hour=$((value/100))
   min=$((min*60));
   hour=$((hour*3600));
   sec=$((hour+min));
   echo $sec;
}

#-- error message
function errMsg() {
   echo "Use: ${myname} [options ...]";
   echo;
   echo "Default options:";
   echo "--driver=${driver} [v4l/v4l2]";
   echo "--norm=${norm} [palm/paln/pal/ntsc]";
   echo "--channel=${channel}";
   echo "--channelist=${channelist}";
   echo "--width=${width}";
   echo "--height=${height}";
   echo "--ovc=${ovc}";
   echo "--vcodec=${vcodec}";
   echo "--vbitrate=${vbitrate}";
   echo "--oac=${oac}";
   echo "--cbr=${cbr}";
   echo "--input=${input} [Television/Composite1/S-Video]";
   echo "--output=${output}";
   echo "--vo=${vo}";
   echo "--log=${log}";
   echo;
   echo;

   case $1 in
      pid)   echo "ERROR IN PLAY/REC : To debug errors to play/rec use --log option and see log to many informations.";;
      input) echo "INVALID INPUT     : Use --input with [Television/Composite1/S-Video]";;
      mplayer|mencoder) echo "CAN'T FOUND PROGRAM ${1}";
   esac
   
}

#-- Change input parameters to getopts format
set -- ${*//--driver/-d};
set -- ${*//--norm/-n};
set -- ${*//--channel/-c};
set -- ${*//--channelist/-l};
set -- ${*//--width/-W};
set -- ${*//--heigth/-H};
set -- ${*//--ovc/-V};
set -- ${*//--vcodec/-C};
set -- ${*//--vbitrate/-b};
set -- ${*//--oac/-A};
set -- ${*//--cbr/-R};
set -- ${*//--input/-i};
set -- ${*//--output/-o};
set -- ${*//--vo/-O};
set -- ${*//--play/-p};
set -- ${*//--rec/-r};
set -- ${*//--log/-L};
set -- ${*//--time/-T};
set -- ${*//--help/-h};

#- get parameters
while getopts d:n:c:l:W:H:V:C:b:A:R:i:o:O:prhL:T: value 2>/dev/null ; do
   case $value in
      d) driver="${OPTARG}";;
      n) norm="${OPTARG}";;
      c) channel="${OPTARG}";;
      l) channelist="${OPTARG}";;
      w) width="${OPTARG}";;
      H) heigth="${OPTARG}";;
      V) ovc="${OPTARG}";;
      C) vcodec="${OPTARG}";;
      b) vbitrate="${OPTARG}";;
      A) oac="${OPTARG}";;
      R) cbr="${OPTARG}";;
      i) input="${OPTARG}";;
      o) output="${OPTARG}";;
      O) vo="${OPTARG}";;
      L) log="${OPTARG}";;
      T) time="${OPTARG}";;
      p) play=1;;
      r) play=;;
      h) errMsg help; exit 0;;
      *) errMsg help; exit 0;;
   esac
done 

#-- convert input parms
case ${input} in
   Television) input=0;;
   Composite1) input=1;;
   S-Video)    input=2;;
   *)               errMsg input; exit 0;;
esac

#-- convert norm para minusculo
norm=$( echo ${norm} | tr A-Z a-z );

#-- Ajusta parametros para v4l2
if [ "${driver}" = "v4l2" ] ; then
   #0 = PAL; 1 = NTSC; 2 = SECAM; 3 = PAL-Nc; 4 = PAL-M; 5 = PAL-N; 6 = NTSC-JP; 7 = PAL-60;
   case ${norm} in
      pal)           norm=0;;
      ntsc)          norm=1;;
      secam)         norm=2;;
      pal-nc|palnc)  norm=3;;
      pal-m|palm)    norm=4;;
      pal-n|paln)    norm=5;;
      ntsc-jp|paljp) norm=6;;
      pal-60|pal60)  norm=7;;
   esac
   normopc="normid";
else
   normopc="norm";
fi

gparms="driver=${driver}:${normopc}=${norm}:channel=${channel}:chanlist=${channelist}:width=${width}:height=${height}:input=${input}";

if [ ! -z ${play} ] ; then
   command="mplayer  -tv ${gparms} -vo ${vo} tv://";
   msglog="${0} play channel ${channel} ";
else
   command="mencoder -tv ${gparms} -ovc ${ovc} vcodec=${vcodec}:vbitrate=${vbitrate} -oac ${oac} cbr:${cbr} -o ${output} tv://";
   msglog="${0} rec channel ${channel} ";
fi

#-- verify command
if  ! which $( echo $command | cut -d" " -f1 ) >/dev/null; then
   errMsg $command;
   exit 1;
fi

#-- execute the mplayer our mencoder
start=$(date);
echo ${command};
${command} >${log} 2>&1 &
cmdpid=${!};

#-- in error case no has pid
[ -z "${cmdpid}" ] && errMsg pid && exit 0;

#-- get time to reproduction
time=$( convTime ${time} );

#-- if time reproduction, kill proccess after time
[ ${time} -ge 1 ] && sleep ${time} && kill ${cmdpid};
end=$(date);

#-- write log message
logger 0 "${msglog} pid:${cmdpid} start:${start} end:${end}";

exit 1;

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