JB Live Show Recorder, now with 6x more BACON!!!

#!/bin/bash
## This is the third, probably final, iteration for the JB Live Stream recorder.
## It is going to us the UTC time stamp so you don't have to use more than one loop, for now, to record a single show.
## You will need to make sure that you have a Videos folder in your home folder, or edit the script to write the files to where you want.
## If you don't want a particular show recorded just comment out that section.
## This script has no license and is should be used with care as a single recording can produce a file over 1GB.

## If the day of the show changes change the "$d -eq X" of the while statement in the script. Sunday=0 Monday=1,,,,Saturday =6.

## Updated 28 May 2014, Changed the variable d in the main while loop to reflect the Pacific timezone, matching the tcalc function.

lastrt=0930  ## *trt is the start time of a show. Default is 30 mins prior.
lastop=1145  ## *top is the stop time of a show.
codtrt=1130   ## Coder Radio start time
codtop=1330  ## Coder Radio stop time
liutrt=1330  ## Linux Unplugged start time
liutop=1530  ## Linux Unplugged stop time
scitrt=1900  ## SciByte start time
scitop=2100  ## SciByte stop time
bsdtrt=1030  ## BSDNow start time
bsdtop=1300  ## BSDNow stop time
unftrt=1730  ## UnFilter start time
unftop=2000  ## UnFilter stop time
tsntrt=1230  ## TechSNAP start time
tsntop=1500  ## TechSNAP stop time
nrstrt=1145   ## FauxShow start time
nrstop=1315  ## FauxShow stop time

## This is the main function, the 'meat' of this script.
bacon(){
        echo "Now recording $1$2"
    zm=`expr 60 \* \( \( \( $3 / 100 \) \- \( $4 / 100 \) \) \- 1 \)`
    zn=`expr 60 \+ \( \( $3 % 100 \) \- \( $4 \% 100 \) \)`
    mh=`expr \( $zm \+ $zn \) \/ 60`
    mm=`expr \( $zm \+ $zn \) \% 60`
    `mencoder -really-quiet http://videocdn-us.geocdn.scaleengine.net/jblive-iphone/live/jblive.stream/playlist.m3u8 -oac mp3lame -ovc lavc -lavcopts vcodec=msmpeg4 -ofps 30 -endpos 0$mh:$mm:00 -o ~/Videos/$1\-$5.mp4`
    killall mencoder
    sleep 5
}

tcalc(){
s=`TZ=America/Los_Angeles date +%H%M`       ## Grab time variable with no place padding.
t=`expr $s / 1`         ## Expr to drop the 0 off time variable for times less than 1000.
}

while true

do

tcalc   ## Time calculation
mh=0    ## Mencoder hour calc set.
mm=0    ## Mencoder minute calc set.
d=`TZ=America/Los_Angeles date +%w`         ## Date veriable 0=Sunday 3=Wednesday.
ot=`date +%c`           ## Time and date stamp for the script's nothing to record output.

        while [ $t -ge $lastrt ] && [ $t -lt $lastop ] && [ $d -eq 0 ]; do
                clear
        bacon LAS '.' $lastop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
        done

    while [ $t -ge $nrstrt ] && [ $t -lt $nrstop ] && [ $d -eq 0 ]; do
        clear
        bacon Faux 'Sho.......ITS NOT A REAL SHOW!!!!!' $nrstop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

    while [ $t -ge $codtrt ] && [ $t -lt $codtop ] && [ $d -eq 1 ]; do
        clear
        bacon Coder 'Radio.' $codtop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

        while [ $t -ge $liutrt ] && [ $t -lt $liutop ] && [ $d -eq 2 ]; do
        clear
        bacon Linux 'Unplugged.' $liutop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

        while [ $t -ge $scitrt ] && [ $t -lt $scitop ] && [ $d -eq 2 ]; do
        clear
        bacon SciByte '.' $scitop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

    while [ $t -ge $bsdtrt ] && [ $t -lt $bsdtop ] && [ $d -eq 3 ]; do
        clear
        bacon BSD 'Now.' $bsdtop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

    while [ $t -ge $unftrt ] && [ $t -lt $unftop ] && [ $d -eq 3 ]; do
        clear
        bacon UnFilter '.' $unftop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

    while [ $t -ge $tsntrt ] && [ $t -lt $tsntop ] && [ $d -eq 4 ]; do
        clear
        bacon TechSNAP '.' $tsntop $t `date +%d%b%Y-%H%M%S`
        tcalc
        clear
    done

        killall mencoder
        clear
        echo "Nothing to record. $ot"
        sleep 10

done