#!/bin/bash

if [ $# -lt 1 ]; then
	echo "Uso: $0 <url del video>"
	exit 1
fi

ID=`echo $1 | cut -d= -f2 | cut -d\& -f1`
FILE="youtube-${ID}"
BASE_URL="http://youtube.com/get_video.php"

wget -O /tmp/${FILE} $1

if [ $? == 0 ]; then
	T_PARAM=`grep '&t=' /tmp/${FILE} | head -n 1 | awk -F'&t=' '{print $2}' | cut -d\& -f 1`
	VIDEO_URL="${BASE_URL}?video_id=${ID}&t=${T_PARAM}"

	wget -O ${FILE}.flv $VIDEO_URL
	
	if [ $? != 0 ]; then
		rm -f ${FILE}.flv
		exit 1
	else
		ffmpeg -i ${FILE}.flv ${FILE}.avi
	fi
fi

rm -f /tmp/${FILE}