[mythtv-users] System event 'Recording started' triggered twice (MythTV-0.28)

[Rajil Saraswat]

Hello,

I am trying to setup 'System event' to trigger a channel change. I am
using a cut down version of the script posted in the wiki
(https://www.mythtv.org/wiki/IPTV_Encoders_as_a_Capture_Device#mythtv_recording_started.sh).
It seems that the system event call is triggered twice whenever the
channel is changed (rather than once). Here is the log when a channel is
changed.

Log (/var/log/mythtv/MyScripts.log):

script mythtv_recording_started start
20171126060117 mythtv_recording_started.sh launch
20171126060117 recording_started.sh: CardID 5 Channel  2532
20171126060117 recording_started.sh: Cardid 5 change channel
script mythtv_recording_started end
script mythtv_recording_started start
20171126060118 mythtv_recording_started.sh launch
20171126060118 recording_started.sh: CardID 5 Channel  2532
20171126060118 recording_started.sh: Cardid 5 change channel
script mythtv_recording_started end

The comment 'script mythtv_recording_started start' is called twice
above. Any idea why the system event `Recording started` is invoked twice?

Thanks

-------------------------------------------------------------

Here is the full script:

$ cat /usr/local/bin/mythtv_recording_started.sh
#!/bin/bash -x

logfile="/var/log/mythtv/MyScripts.log"  # point this to where you want
the log files
echo  "script mythtv_recording_started start" >> "$logfile"

CardID="$1"
Channel="$2"
StartTime="$3"

echo $StartTime "mythtv_recording_started.sh launch" >> "$logfile"

Chan_Change_Cmd="/usr/local/bin/lirc1_1.sh"
##############################################################################################


echo $StartTime "recording_started.sh: CardID" $CardID "Channel "
$Channel >> "$logfile"
Enc_Status=`which mythtv_encoder_status`

#############################################################################

# if cardid is 5 and this is LiveTV,
# change the channel

case $CardID in

5)
      
     Encoder_status=`mythtv_encoder_status --encoder=$CardID`
     if [ "$Encoder_status" = "WatchingLiveTV" ]
     then

          Channel=${Channel#?}
          Channel=$((10#$Channel))

          ###### update the channel change command as needed #######

         Channum=`mythtv_get_channum_from_chanid.sh $Channel`

         $Chan_Change_Cmd  $Channum &

          ###########################################################

          echo $StartTime "recording_started.sh: Cardid $CardID change
channel" >> $logfile

     fi

     ;;

*)
     echo $StartTime "recording_started.sh: Cardid" $CardID "NO ACTION"
>> "$logfile"

     ;;
esac
echo  "script mythtv_recording_started end" >> "$logfile"
exit 0