Nixes / wifibroadcast

An unofficial github fork of the project of the same name. Forked from https://bitbucket.org/befi/wifibroadcast on 01/06/2016

Introduction

This project allows durable low latency transmission of HD video using off the shelf hardware.

A good explanation of the how and why is available from the original author befinitiv here

This repository is just the source code along with some random notes gathered from forums, and was created to make a centralised source of documentation in the form of the wiki, and to allow use of GitHub’s issue tracker.

Forked from bitbucket on 01/06/2016.

Original setup instructions found here

Other resources from around github

• An OSD for wifibroadcast
• Additional patches to improve wifibroadcast
• Misc WifiBroadcast Utilities

Usage

download and compile with

apt-get install git libpcap-dev iw
git clone https://github.com/Nixes/wifibroadcast.git
cd wifibroadcast
make

run using scripts in /scripts folder

eg if you want h264 run on the transmitter

sudo ./tx_h264.sh

and on the receiver

sudo ./rx_h264_mplayer.sh

settings including Wi-Fi device names are modified in settings.sh

Latency

Lowest actually (repeatably) obtained by me: 128ms

For comparison even some nice analog FPV cameras that use the Sony Effio chip have similar latencies. Except this is HD and has much better quality!

Experimental Log (including latency measurements)

Hardware Requirements

Transmitter

• Raspberry Pi (Zero 1.3, A/A+, B/B+, B2)
• Raspberry Camera
• compatible Wi-Fi adaptor

Receiver

• Raspberry (Zero, A/A+, B/B+, B2)
• compatible Wi-Fi adaptor

or (even better)

• Any Linux device with enough compute to software decode h264 or mjpeg in mplayer or ffplay
• A Wi-Fi adaptor that supports monitor mode fast enough
• Multiple compatible Wi-Fi adaptors to use for diversity reception

potentially android?

Compatible (tx/rx) Wi-Fi adaptors

Are found in this list on the wiki

Note this wiki is publicly editable, feel free to add your own experiences with wifi dongles here.