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raspberry-pi-3b.md

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Configurations for the Raspberry Pi 3B

There are two Raspberry Pis configured slightly differently, one is streaming a video from the camera and the other one is playing the video off of an embedded player in a SSB feed. Let's call them Streamer Pi (the one with the Raspberry Pi camera) and Subscriber Pi. The steps are almost identical for both:

  1. Flash Raspbian

  2. Install prototype at commit 9cc421b9e8c9f4a7340e7a4c85208de6a251c18c (which at the time of writing is identical as develop) with the following features enabled:

     WITH_WIFI_AP
 WITH_IPFS
 WITH_IPFS_PI_STREAM (for Streamer Pi only)
 WITH_SSB
 WITH_SSB_WEB
 WITH_EXTRA_TOOLS

  3. Run ipfs id on one Pi and on the other node, use ipfs bootstrap add to add its cjdns-transported IPFS address so they will peer with one another

  4. Assign IPv4 addresses to the eth0 interface of each Pi by adding to /etc/network/interfaces with the following, with a different value of x for each Pi:

     allow-hotplug eth0
 iface eth0 inet static
     address 192.168.10.x
     netmask 255.255.255.0
     network 192.168.10.0
     broadcast 192.168.10.255

    This allows for SSB discovery because at the time of writing, discovery over IPv6 is only being worked on in sbot

  5. Replace PI_ROOT/var/www/sbot with REPO_ROOT/src/sbot from this repository to get fixes that still need to be upstreamed

  6. Change M3U8_SIZE to a smaller value in /usr/bin/process-stream.sh such as 2 for less latency in the live stream

  7. Occassionally it is necessary to check df for space and ipfs repo gc to prevent using up all the SD card space

Install ipfs-live-streaming player UI (optional)

  1. Download the ipfs-live-streaming video player to PI_ROOT/var/www/video-player

  2. Create /etc/nginx/site-path-enabled/ipfs-live-streaming.conf with:

     location /ipfs-live-streaming {
   alias /var/www/video-player;
   index index.html index.htm index.nginx-debian.html index.php;
   try_files $uri $uri/ =404;
   location ~ \.php$ {
     try_files $uri =404;
     fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
     fastcgi_index index.php;
     fastcgi_param SCRIPT_FILENAME /var/www/$fastcgi_script_name;
     include fastcgi_params;
   }
 }

  3. Edit /var/www/video-player/js/common.js where <IPNS_ID> is that of Streamer Pi:

     var ipfs_gateway_self = 'http://10.0.0.1'; // IPFS gateway of this node
 var ipfs_gateway_origin = 'http://10.0.0.1'; // IPFS gateway of origin stream
 //var m3u8_ipfs = 'live.m3u8'; // File path to m3u8 with IPFS content via HTTP server
 var m3u8_ipfs = 'http://10.0.0.1/ipns/<IPNS_ID>'; // URL to m3u8 via IPNS (uncomment to enable)
 var m3u8_http_urls = []; // Optional list of URLs to m3u8 over HTTP

  4. Restart nginx