#!/bin/bash
saveto="/Volumes/Data/NASA"
filename="$saveto/NASA-TV-HD.`date +%y%m%d-%s`"

httpurl='http://liveips.nasa.gov.edgesuite.net/msfc/Wifi.m3u8'
trap "break; echo Finished recording. ; exit 0" SIGINT SIGTERM

echo -n Buffering
#Get initial set of files
for nextfile in $(curl -s $httpurl | grep '.ts'); do
        echo -n .
        curl -s "$nextfile" >> $filename.ts
        lastfile="$nextfile"
done

echo 100\%

echo Starting continuous recording. Press CTRL-C to quit.
while true; do
        nextfile=$(curl -s $httpurl | grep '.ts' | tail -1)
        if [ "$nextfile" != "$lastfile" ]; then
                curl -s "$nextfile" >> $filename.ts
                lastfile="$nextfile"
        fi
 #File list updates every 10 seconds, but don't want to sleep too long and miss an update!
        sleep 7
done