VideoStreaming Download DietPi from http://fuzon.co.uk/phpbb/viewtopic.php?f=8&t=9 Install DietPi on sd card In the installation screen you can choose your own software. For this project we need ftp, so make sure that the ftp is selected. In the installation it will ask if you need the standalone version or another one. choose the standalone version. To access the raspberry Pi's from your pc or laptop you can use ssh. In this project a special program called putty is used. After you have installed dietPi on all the Raspberry Pi's you can stress test them to make sure that they are operating. For this use install stress. The Dietpi does not make use of sudo since this program is also removed and you are always operating from the root. So you have to be really sure what you are doing. To install stress type: \newline install stress To run the test type: stress --cpu 5 --io 5 --vm 5 --vm-bytes 10M --timeout 3600s \newline Now the webserver will be installed on all Pi's. For this you can type: \newline Nginx install Download & unpack latest nginx-rtmp Download & unpack Nginx \newline Build nginx with nginx-rtmp install FFmpeg edit the configuration file of Nginx so it can stream RTMP start Nginx and you can stream. (test if this stream is working) \newline The RTMP stream you are streaming has standard port 1935 for the stream. This is because of the protocol. \newline After the RTMP stream is working the JW player can be installed. This has to be done in the folder where the web pages are. The JW player makes it possible to stream the video inside the browser.
Load balancer
One Raspberry Pi will be the load balancer. This can be done by adjusting the configuration file. To do this type: \newline nano /etc/nginx/sites-available/default In the first line you can add the upstream module we need. To do this type: \newline upstream backend { server backend1.example.com; server backend2.example.com; server backend3.example.com; } The backend1, backend2 and backend3 can be ip addresses or internet addresses. I used the ip adresses of the other Pi's. To make it operating we need to adjust another module that is inside the server part where somewhere stands: \newline location / { ... } we need to adjust what is standing in the middle of it. There only needs to be the line: proxy_pass http://backend;
Now we have to restart the load balancer. We now have our own load balancer.
Laptop or Desktop In this research a Laptop was used to run some testing software. This could also be a normal desktop. The Laptop is running on the operating system Microsoft Windows 8.Apache JMeter is used to test if the server is streaming correctly \cite{jmeter}. A website or media player is needed to test if the the RTMP stream comming from your Raspberry Pi is working.