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@poppen
Last active September 17, 2017 02:10
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らじるらじる録音スクリプト forked from https://gist.github.com/poppen/0e054e20947d56756c489f74c7f53d0e
#!/bin/bash
set -eu
XML_URL="http://www.nhk.or.jp/radio/config/config_web.xml"
XML="/tmp/config_web.xml.$$"
trap 'rm $XML; exit 1' 1 2 3 15
date=$(date '+%Y-%m-%d-%H-%M')
outdir="."
identify_area()
{
if [[ "$1" =~ [[:alnum:]]+-[[:alnum:]]+ ]]; then
local area=${1%-*}
else
local area="tokyo"
fi
echo "$area"
}
identify_channel()
{
if [[ "$1" =~ [[:alnum:]]+-[[:alnum:]]+ ]]; then
local channel=${1#*-*}
else
local channel=$1
fi
echo "$channel"
}
get_playurl()
{
local area=$1 channel=$2
local play_url count i
count=$(xmllint --xpath 'count(//data)' "$XML")
for ((i=1; $i <= "$count"; i=$i+1)); do
if [ "$(xmllint --xpath '//data['"$i"']/area/text()' "$XML")" = "$area" ]; then
play_url=$(xmllint --nocdata --xpath '//data['"$i"']/'"$channel"'hls/text()' "$XML")
echo "$play_url"
return 0
fi
done
echo "Can't find channel url" >&2
exit 1
}
#引数が足りないときは、使用方法を表示して戻り値1でバイバイ。
if [ $# -le 1 ]; then
echo "usage : $0 channel_name duration(minutes) [outputdir] [prefix]"
exit 1
fi
#引数が2つ以上あるときは、1個目をCh.名に、2個目を録音時間に指定。
if [ $# -ge 2 ]; then
channel=$1
DURATION=$(($2 * 60 + 60))
fi
#引数が3つ以上あるときは、3個目を出力先ディレクトリに指定。
if [ $# -ge 3 ]; then
outdir=$3
fi
#引数が4つあるときは、4個目をファイル名の固定値に指定する。指定しなければ固定値はCh.名。
PREFIX=${channel}
if [ $# -ge 4 ]; then
PREFIX=$4
fi
curl -s -o "$XML" "$XML_URL"
channel=$(echo "$channel" | tr '[:upper:]' '[:lower:]')
area=$(identify_area "$channel")
ch=$(identify_channel "$channel")
play_url=$(get_playurl "$area" "$ch")
filename="${PREFIX}-${date}.m4a"
ffmpeg -y -i "$play_url" -t "$DURATION" -codec copy "/tmp/${filename}"
ffmpeg -y -i "/tmp/${filename}" -acodec libmp3lame -ab 64k "${outdir%%/}/${filename%%.*}.mp3" && rm -f "/tmp/${filename}" && rm -f "$XML"
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