Our fire department is moving to 700 mhz digital radios. The move will render all of their analog channel scanners useless. The new digital scanners are upwards of $600 each, so we’re trying not to purchase many of them.
I’m testing out the possibility of capturing the digital scanner traffic via a line out feed, and presenting to the department via a mms://mediaserver/scanner url.
This was a snap with windows media encoder, and pushing this to our media server.
Getting this to desktops isn’t a problem.
They’d also like to pick this up via an extension on the phone system.
I’ve installed mplayer, and setup a streaming category in Music on Hold.
The application this category is pointed to is a bash script in /etc/asterisk/mohstream.sh
contents of this file:
#!/bin/bash
if [ -n “ls /tmp/pdmohpipe” ]; then
rm /tmp/pdmohpipe
fi
PIPE="/tmp/pdmohpipe"
mknod $PIPE p
mkfifo $PIPE
cat $PIPE &
sleep 3
mplayer -nocache mms://ratchet/cdapdscan -really-quiet -quiet -ao pcm:fast -channels 1 -af resample=8000,channels=1,format=mulaw -ao pcm:file=$PIPE | cat $PIPE
rm $PIPE
I have a custom extension that I dial from any phone and it plays this hold music.
exten => 1234,1,Answer()
exten => 1234,n,Wait(1)
exten => 1234,n,MusicOnHold(cdapdscan)
exten => 1234,n,Wait(1)
exten => 1234,n,Hangup()
This is firing off the mplayer utility whenever module_admin reload (orange button) is pressed.
After several reloads - I’m getting multiple instances of the mplayer process writing to the same pipe - and it creates echos/loops when listened to over the phone.
Killing all the mplayer processes, and running “module reload res_musiconhold.so” from the asterisk console clears up the multiple streams, but I would like to automate this so I don’t have to baby sit the mplayer process.
Does anyone have any suggestions on how to keep the mplayer process from relaunching?
Thanks
Kirk.