Branch
UE5.3
UE5.2
Master

The official home for the Pixel Streaming servers and frontend!

The frontend and web server elements for Unreal Pixel Streaming (previously located in Samples/PixelStreaming/WebServers) are now in this repository, for all to contribute to. They are referred to as the Pixel Streaming Infrastructure.

Goals

The goals of this repository are to:

• Increase the release cadence for the Pixel Streaming servers (to mitigate browser breaking changes sooner).
• Encourage easier contribution of these components by Unreal Engine licensees.
• Facilitate a more standard web release mechanism.
• Grant a permissive license to distribute and modify this code wherever you see fit (MIT licensed).

Contributing

If you would like to contribute to our repository, please reference our contribution guide. Thank you for your time and your efforts!

Contents

The Pixel Streaming Infrastructure contains reference implementations for all the components needed to run a pixel streaming application. They are structured as separate projects, which work together, but are designed to be modular and interoperable with other implementations which use WebRTC technology. These implementations include:

• A signalling web server, called Cirrus, found in SignallingWebServer/.

• An SFU (Selective Forwarding Unit), found in SFU/.

• A matchmaker, found in Matchmaker/.

• Several frontend projects for the WebRTC player and input, found in Frontend/:

  • shared libraries for communication and UI functionality
  • separate implementations using different techologies such as TypeScript or React/JSX

  For detailed information, see the frontend readme.

Releases

We release a number of different components under this repository, specifically:

• Container images for the signalling server
• NPM packages for the frontend
• Source releases of this repo with the reference frontend built as a minified js bundle

Container images

The following container images are built from this repository:

• ghcr.io/epicgames/pixel-streaming-signalling-server (since Unreal Engine 5.1)
  ( This link requires you to join Epic's Github org )

NPM Packages

The following are unofficial NPM packages (official ones coming soon):

Branch	Frontend library	Frontend reference ui
UE5.2	lib-pixelstreamingfrontend-ue5.2	lib-pixelstreamingfrontend-ui-ue5.2

NPM getting started

#frontend (core lib)
npm i @epicgames-ps/lib-pixelstreamingfrontend-ue5.2
#frontend ui
npm i @epicgames-ps/lib-pixelstreamingfrontend-ui-ue5.2

Documentation

• General Docs
• Frontend Docs
• Signalling Server Docs TO DO
• Matchmaker Docs TO DO
• SFU Docs TO DO

Tagged source releases + built typescript frontend

Github releases

Versions

We maintain versions of the servers and frontend that are compatible with existing and in-development version of Unreal Engine.

⚠️ There are breaking changes between UE versions - so make sure you get the right version. ⚠️

For a list of major changes between versions please refer to the changelog.

This repository contains the following in branches that track Unreal Engine versions:

Branch	Status
Master	Dev
UE5.3	Pre-release
UE5.2	Current
UE5.1	Supported
UE5.0	End of life
UE4.27	Unsupported
UE4.26	Unsupported

Legend	Meaning
Dev	This is our dev branch, intended to be paired with ue5-main - experimental.
Pre-release	Code in here will be paired with the next UE release, we periodically update this branch from master.
Current	Supported and this is the branch tracking the latest released version of UE.
Supported	We will accept bugfixes/issues for this version.
End of life	Once the next UE version is released we will not support this version anymore.
Unsupported	We will not be supporting this version with bugfixes.

Legal

© 2004-2023, Epic Games, Inc. Unreal and its logo are Epic’s trademarks or registered trademarks in the US and elsewhere.