Info screen³

     

When you need to display same content to multiple locations or need to remotely control a slide show.

Features

• Displays slide show in browser
• Uses Full HD 1920x1080 resolution internally
• Easy-to-use editor for slides. Supports adding easily text and image content
• The output resolution does not matter, all contents are automatically scaled from the Full HD source
• Finnish and English language support, sets automatically from browser language.
• Multiple renderers to choose from:
  1. WebGL (with 60+ changeable transitions)
  2. CSS3 (only blinds3D)
  3. Lite (only cross fade)
     • in case your viewer laptop is totally a potato
• Content
  • Multiple screen locations, for example big screen may have different slide shows than kiosk -screen etc.
  • Webpages as slide + custom scaling of the content
    • can be useful for dynamic content like timetables, brackets and so on
  • Now with embedded Youtube video support (to have a 10h nyancat)
  • Supports mp4 video as a slide, in case you wish to run ads or democompo entry as a content slide.
  • Optional support for local RTMP Live streams, buffer delay is about 2 seconds.

Setup

1. run npm install
2. copy .env.example to .env
3. run npm start
   • optionally you can start as a background task: npm run-script daemon, it will output just a pid for the new process and you find new files: output.log and errors.log at the data directory.

Configuration

To access the infoscreen server outside from the localhost, like at LAN network, the config must be bind to external IP your server machine has. Configuration is set by environmental variables or by editing .env file.

If you wish to have live stream support at local network using OBS, set MEDIASERVER to true and set desired streamKey

You can run the server listen port as well the default http port 80, but in that case you have to run the app with privileges with linux systems: sudo npm start

Plugins

List of available plugins

Plugin	Description
profiler	Outputs memory usage statistics at console
overlay	Change infoscreen to work as overlay to stream, by disabling background layers
ping	Example plugin to display ping for local network machine.

Usage

Viewer is located at: http://localhost:8000
Admin interface is located at: http://localhost:8000/admin

for production it is highly encouraged to change admin credentials from the default!

Username	default password
admin	admin
view	view

Local stream support for OBS

Works only when config has mediaServer set to true

at OBS go to Settings -> Stream

Setting	Value
Service	Custom...
URL	rtmp://localhost/live
Stream key	config.streamKey value, defaults to: INFOSCREEN3
Use Authentication	leave un-ticked

Note

Use only baseline-encoding for H.264, other options not works with the embedded javascript player

Mediaserver admin panel

if you have changed the default port from 8000 to something else, the correct port to access this feature is (config.serverListenPort+1)

Admin interface is located at: http://localhost:8001/admin It accepts the same crendetials as configured at the main app.

Environment variables

ENV	default	Usage
PORT	8000	Server listen port
HOST	localhost	Host or ip, where the server is externally accessible
ADMIN_USER	admin	Username to access admin interface
ADMIN_PASS	admin	Password for the admin interface
USER	view	Username to access viewer
PASS	view	Password to access viewer
FRONT_PROXY	false	Tell software that it's behind a front proxy
DEBUG	false	whatever to debug... or not
SESSIONKEY	predefined	used to encrypt cookies
STREAMKEY	INFOSCREEN3	streamkey used at OBS
MEDIASERVER	false	use streaming feature
LOCALE	en	available locales: en, fi
ACCESSKEY	<not set>	use accesskey to access views
GUARDRAILS	'[{"line": [240, 0, 240, 1080]}, {"line": [1680, 0, 1680, 1080]}]'	Adds additional guardrails into the grid editor. The defaults are for a 4:3 ratio allowing slides to be created for older projectors. In addition to the line property the provided json also takes optional input of the stroke color, strokeWidth width and opacity opacity of the guardrails

To use access key edit the environment variable ACCESSKEY=yourkey to .env-file. After you have set the access key you can use it like this: http://127.0.0.1/display/0/lite?accesskey=yourkey

Dockerfile

Dockerfile is provided for building a docker container.
Docker container accepts the same ENV variables from .env-file.

docker compose up -d --build

Linux service

Service file for sysctl, provided by Hartsa (many thanks!) Just edit the working directory of the script and change the user from root to yours, if needed.

sudo cp infoscreen.service /etc/systemd/system/
sudo systemctl start infoscreen.service
sudo systemctl enable infoscreen.service

If you need to see status of the service:

sudo systemctl status infoscreen.service

Thanks

WebGL renderer bases upon initial working of Creative WebGL Image Transitions repository here at github. Thanks for your awesome article.