Improving the stability of the TCPSClient

This script is quite helpful when you want to run the TCPSClient (beta 3) somewhat completely unattended.

If the program hangs up, fails or anything doesn’t work as expected the CPU load increased drastically. This is taken as an indicator and the TCPSClient will be terminated and restarted.

declare -i MULTIPLIER=10

killall -v $PROCESSNAME
sleep 3
while true; do
	if ps ax | grep -v grep | grep TCPSClient > /dev/null 
		CPU_TEMP_USAGE=$(top -bn1 |grep TCPSClient | awk -F' ' '{print $9}')
		CPU_USAGE=$(echo "scale=2;$CPU_TEMP_USAGE*$MULTIPLIER"|bc)
		if [ $CPU_INT -gt $CPU_USAGE_THRESHOLD ] ; then
			echo KILLING
			killall -v $PROCESSNAME
			sleep 3
		/home/pi/TCPSClient/TCPSClient.bin &
		sleep 3


This is one of the very few Linux scripts I did. Be gentle. Feel free to contact me if there are questions, suggestions, etc.


<TL; DR> I’ve built a TCPSyphon Server myself in Java and tried to circumvent some of the flaws of the original Version </TL; DR>


Maybe you heard about Syphon. “Syphon is an open source Mac OS X technology that allows applications to share frames – full frame rate video or stills – with one another in realtime” (Link). It was originally intended to only work locally and not be shared between different Hosts on a Network. Fortunately someone took care of this and built a set of applications to share “Syphon data” between multiple Computers. Actually it doesn’t: It renders local Syphon data into single images (jpeg, for example), applies a compression and sends them over the network. Anyways, this is one of the applications you don’t get around as a VJ. You just HAVE to have it: TCPSyphon.

The person behind the TCPSyphon-apps also built a client for the Raspberry Pi. The TCPSClient. Now things become really interesting.

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