catturare uno stream audio su hard disk

[gurutech]

Ciao,
oggi ho scritto questo, magari serve a qualcuno! si basa su mplayer e lame
e vi permette di salvare una Internet radio su hard disk

#!/bin/bash

#    grab-radio - this script will grab an audio stream to your hard disk
#
#    Copyright (C) 2009  Gianluca 'gurutech' Mascolo [email protected]
#
#    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 3 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, see <http://www.gnu.org/licenses/>.


#Requirements: mplayer, lame, standard GNU/Linux tools (bash, ps, sleep, date, ... and so on)

#when this scripts finish, you will have
#radioXXXX.mp3
#radioYYYY.mp3
#...
#stored in the output directory

MPPID=0
CURDIR="$PWD"
#change to dir where do you want to save streams
cd /home/gmascolo/downloads
RADIOURL="http://67.212.179.138:8300/"
#divide raw streams in 204800Kbytes (200MB) trunks
MAXSTREAMSIZE=204800

spawnmp ()
{
 mplayer -really-quiet -ao pcm:waveheader:file=radio.wav -vo null -vc dummy "$RADIOURL" 2> /dev/null &
 sleep 1
 MPPID=$(jobs -l  | grep radio.wav | awk '{print $2}' | grep -v "^$MPPID$" )
 return $MPPID
}

STIME=$(date +%s)
ETIME=$STIME
ELAPSED=$((ETIME-STIME))


 #Stop after 4000 seconds elapsed
 while ( [ $ELAPSED -lt 4000 ] ); do {
    clear
    MPISDEAD=0
    STREAMSIZE=0
    OLDSIZE=-1
    spawnmp
    while ( [ $MPISDEAD -eq 0 ] && [ $STREAMSIZE -lt $MAXSTREAMSIZE ] ); do {
    clear
    date
    echo $ETIME
    echo "Mplayer running in background with PID=$MPPID"
    sleep 5
    STREAMSIZE=$(du -sk radio.wav | awk '{print $1}')
    [ $OLDSIZE -lt $STREAMSIZE ] || kill $MPPID
    OLDSIZE=$STREAMSIZE
    MPISDEAD=0
    ps --pid $MPPID h &> /dev/null || MPISDEAD=1
    echo $MPISDEAD
 }
 done
 ETIME=$(date +%s)
 [ $MPISDEAD -eq 0 ] && kill $MPPID
 du -sk radio.wav
 rm -f grabbed.wav
 mv radio.wav grabbed.wav
 lame -S grabbed.wav radio$ETIME.mp3 &
 ELAPSED=$((ETIME-STIME))
}
done

rm -f radio.wav
cd "$CURDIR"