visio

Ultra fast live streaming raw h264 from Raspberry Pi to multiple browser clients with Node, websockets and Broadway. The latency on LAN at 25fps is about 4 frames or 160ms.

Installation

npm install

If you are going to use UDP, also install socat.

apt install socat

Tested on RPI1, raspbian jessie and node v7.4.0.

Server

Receives h264 stream from raspivid and serves it to websocket clients. Start with node index.js --udpport 8000 --wsport 8081 for UDP mode or node index.js --tcpport 8000 --wsport 8081 for TCP mode.

Streamer

Streams live h264 from raspivid (or gstreamer) to the server. Check raspi.sh and start with ./raspi.sh. You could use something like ffmpeg -re -i foo.mp4 -c:v copy -f h264 udp://localhost:8000 to stream anything, just remember Broadway only supports h264 baseline and no audio.

HTTP-server

You should get one. Tested with http-server from npm.

Client

Minimal client is now running at http://server-ip:8080/. Works on most things with canvas and websockets.