Script for launching multicast videostreaming (with logging, restarting and notifications)

broadcast.sh

#!/bin/bash
#
# Script for managing videostreaming over LAN with logging and GUI notifications.
#
# Dependencies: tstools libnotify-bin
#
# 2012, Novikov «Envek» Andrey. Use it freely under the MIT license.

# Configuration
MULTICASTADDR=224.0.0.1         # Target IP for streaming (from multicast range)
MULTICASTPORT=1234              # Target port for streaming
MULTICASTIFACE=192.168.1.1      # Local interface IP from where stream is going to the world
LOGFILE=/path/to/logfile.log    # A log file for writing what and when have been streamed
LOCKFILE=/path/to/lockfile.lock # Prevent simultaneous launches with a lock file
VIDEOPATH=~/Video               # A path, where videofiles is stored

if [ -z "$DISPLAY" ]
  then export DISPLAY=:0
fi

# Logs an entry to logfile.
# Syntax: log ( message, prefix )
function log () {
  echo -e "${2}`date --rfc-3339=seconds` $1" >> $LOGFILE
}

# Starts broadcasting
function broadcast_start () {
  if [ ! -e "$LOCKFILE" ]; then
    log "Начинаем воспроизведение.\n===================================================" "\n\n"
    touch $LOCKFILE
    killall -9 tsplay 2> /dev/null
    while true; do
      log "Начинаем вещание файлов с начала\n----------------------------------------------------------" "\n\n"
      for videofile in ${VIDEOPATH}/*; do
        if [ ! -e "$LOCKFILE" ]; then break 2; fi
	bname=$(basename "$videofile") # filename without path
	filename="${bname%.*}" # filename without extension
        log "Вещаем $videofile"
	notify-send "Видеовещание" "Вещается $filename" -i /usr/share/pixmaps/totem.xpm
        tsplay "$videofile" ${MULTICASTADDR}:${MULTICASTPORT} -i $MULTICASTIFACE > /dev/null
      done
    done
    log "Конец воспроизведения" "\n\n"
    notify-send "Видеовещание завершено" "В настоящий момент ничего не воспроизводится" -u low -i /usr/share/pixmaps/totem.xpm
  else
    notify-send "Видеовещание уже запущено" "В настоящий момент уже идёт вещание" -u low -i /usr/share/pixmaps/totem.xpm
  fi
}

function broadcast_stop () {
  if [ -f "$LOCKFILE" ]; then
    log "Дана команда на останов вещания..." "\n"
    rm -f $LOCKFILE
    if [ "$1" = "forced" ]; then
      log "Принудительный останов"
      killall tsplay
    fi
  fi
}

case "$1" in
  start)
    broadcast_start &
    ;;
  next)
    killall tsplay
    ;;
  stop)
    broadcast_stop
    notify-send "Видеовещание завершается" "Вещание будет остановлено после завершения вещания текущего ролика" -u low -i /usr/share/pixmaps/totem.xpm
    ;;
  force-stop)
    broadcast_stop forced
    ;;
  restart)
    broadcast_stop forced
    sleep 1
    broadcast_start &
    ;;
  *)
    echo "Usage: $0 {start|next|stop|force-stop|restart}"
    exit 1
esac

exit 0