らじるらじる(NHKラジオ)録音bashスクリプト

rec_nhk.sh

#!/bin/bash
# 参考
# https://gist.github.com/soramugi/836952a6b09e540eb6a3
# https://gist.github.com/matchy2/5310409
# https://gist.github.com/riocampos/5656450

date=`date '+%Y_%m_%d_%H%M'`
outdir="."

if [ $# -le 1 ]; then
  echo "usage : $0 channel_name minuites [outputdir] [prefix]"
  exit 1
fi

if [ $# -ge 2 ]; then
  channel=$1
  DURATION=`expr $2 \* 60 + 15`
fi
if [ $# -ge 3 ]; then
  outdir=$3
fi
PREFIX=${channel}
if [ $# -ge 4 ]; then
  PREFIX=$4
fi

#
# set channel
#
case $channel in
  "NHK1")
    rtmp="rtmpe://netradio-r1-flash.nhk.jp"
    playpath="NetRadio_R1_flash@63346"
    ;;
  "NHK2")
    rtmp="rtmpe://netradio-r2-flash.nhk.jp"
    playpath="NetRadio_R2_flash@63342"
    ;;
  "NHKFM")
    rtmp="rtmpe://netradio-fm-flash.nhk.jp"
    playpath="NetRadio_FM_flash@63343"
    ;;
  *)
    echo "failed channel"
    exit 1
    ;;
esac

rtmpdump -r ${rtmp} \
  --app "live" \
  --playpath ${playpath} \
  --swfVfy http://www3.nhk.or.jp/netradio/files/swf/rtmpe.swf \
  --stop ${DURATION} \
  --live \
  --flv "/tmp/${date}_${PREFIX}.flv"

ffmpeg -i "/tmp/${date}_${PREFIX}.flv" \
  -acodec copy "${outdir}/${date}_${PREFIX}.m4a" && \
  rm -f "/tmp/${date}_${PREFIX}.flv"