This script work in semi automatic mode.
It will switch to second source if first dissapears. Also you can control this switch sending an udp message to port 4444 as you can read in documentation of tsduck. (echo -n "0" >/dev/udp/127.0.0.1/4444) or (echo -n "1" >/dev/udp/127.0.0.1/4444)
event-command - run some program and pass args to the.
-------------------------------------
#/bin/sh
dir="$(basename $0 .sh)"
cdir=$PWD
ip=$(ip a | grep 10.7.130 | awk -F '\.|\/' '{print $4}') # this string define multicast network address
mkdir pids
#Loop cycle
while true; do
sleep 0.5
echo $dir
exec tsswitch --infinite \
--debug=1 -v \
--receive-timeout 100 \
--fast-switch \
--remote 4444 \
--first-input 0 \
--max-input-packets 7 \
--max-output-packets 7 \
--buffer-packets 1316 \
--event-command "$cdir/./sendsnmp.sh" \
-I ip 239.0.11.$ip:51059 \
-I ip 239.0.0.22:51059 \
-O ip 239.4.4.$ip:1234 --local-address 10.7.130.$ip --ttl 1 & echo $! > "$cdir"/pids/"$dir"_pid;
m1=$!
while [ $m1 -gt 0 ]; do
sleep 1;
ps -p $! >/dev/null || m1=[0] ;
done
sed -i /^$!/d "$cdir"/pids/"$dir"_pid
sleep 1
done
