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| UE5.4 | [![Publish frontend lib](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-library-to-npm.yml/badge.svg?branch=UE5.4)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-library-to-npm.yml) | [![Publish ui-lib](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-ui-library-to-npm.yml/badge.svg?branch=UE5.4)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-ui-library-to-npm.yml) | [![Publish cirrus container](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/container-images.yml/badge.svg?branch=UE5.4)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/container-images.yml) | [![Releases](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/create-gh-release.yml/badge.svg?branch=UE5.4)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/create-gh-release.yml) |
| UE5.3 | [![Publish frontend lib](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-library-to-npm.yml/badge.svg?branch=UE5.3)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-library-to-npm.yml) | [![Publish ui-lib](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-ui-library-to-npm.yml/badge.svg?branch=UE5.3)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/publish-ui-library-to-npm.yml) | [![Publish cirrus container](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/container-images.yml/badge.svg?branch=UE5.3)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/container-images.yml) | [![Releases](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/create-gh-release.yml/badge.svg?branch=UE5.3)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/create-gh-release.yml) |
| Master | [![Run library unit tests](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/run-library-unit-tests.yml/badge.svg?branch=master)](https://github.com/EpicGames/PixelStreamingInfrastructure/actions/workflows/run-library-unit-tests.yml) |

# 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**.
# PixelStreamingInfrastructure has moved [here!](https://github.com/EpicGamesExt/PixelStreamingInfrastructure)

## 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](CONTRIBUTING.md). 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/`](SignallingWebServer/).
- An SFU (Selective Forwarding Unit), found in [`SFU/`](SFU/).
- A matchmaker, found in [`Matchmaker/`](Matchmaker/).
- Several frontend projects for the WebRTC player and input, found in [`Frontend/`](Frontend/):
- shared libraries for [communication](Frontend/library/) and [UI](Frontend/ui-library/) functionality
- separate [implementations](Frontend/implementations/) using different technologies such as TypeScript or React/JSX

For detailed information, see the [/frontend](/Frontend/).

## 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](https://github.com/orgs/EpicGames/packages/container/package/pixel-streaming-signalling-server) (since Unreal Engine 5.1)
( This link requires you to join Epic's Github org )
- [ghcr.io/epicgames/pixel-streaming-sfu](https://github.com/orgs/EpicGames/packages/container/package/pixel-streaming-sfu) (since Unreal Engine 5.4)
( 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 |
|--------|------------------|-----------------------|
| UE5.3 |[lib-pixelstreamingfrontend-ue5.3](https://www.npmjs.com/package/@epicgames-ps/lib-pixelstreamingfrontend-ue5.3)|[lib-pixelstreamingfrontend-ui-ue5.3](https://www.npmjs.com/package/@epicgames-ps/lib-pixelstreamingfrontend-ui-ue5.3)|
| UE5.4 |[lib-pixelstreamingfrontend-ue5.4](https://www.npmjs.com/package/@epicgames-ps/lib-pixelstreamingfrontend-ue5.4)|[lib-pixelstreamingfrontend-ui-ue5.4](https://www.npmjs.com/package/@epicgames-ps/lib-pixelstreamingfrontend-ui-ue5.4)|

### NPM getting started

```bash
#frontend (core lib)
npm i @epicgames-ps/lib-pixelstreamingfrontend-ue5.3
#frontend ui
npm i @epicgames-ps/lib-pixelstreamingfrontend-ui-ue5.3
```

## Documentation
* [General Docs](/Docs/README.md)
* [Frontend Docs](/Frontend/README.md)
* [Signalling Server Docs](/SignallingWebServer/README.md)
* [Matchmaker Docs](/Matchmaker/README.md)
* [SFU Docs](/SFU/README.md)

### Tagged source releases + built typescript frontend

[Github releases](https://github.com/EpicGames/PixelStreamingInfrastructure/releases)

## Versions

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

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

<ins>For a list of major changes between versions please refer to the [changelog](https://github.com/EpicGames/PixelStreamingInfrastructure/blob/master/CHANGELOG.md).</ins>

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

| Branch | Status |
|--------|--------|
|[Master](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/master)| Dev |
|[UE5.5](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.5)| Pre-release |
|[UE5.4](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.4)| Pre-release |
|[UE5.3](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.3)| Current |
|[UE5.2](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.2)| Supported |
|[UE5.1](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.1)| End of life |
|[UE5.0](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.0)| Unsupported |
|[UE4.27](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE4.27)| Unsupported |
|[UE4.26](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE4.26)| Unsupported |

| Legend | Meaning |
|---------|-----------|
| Dev | This is our dev branch, intended to be paired with [ue5-main](https://github.com/EpicGames/UnrealEngine/tree/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
© 2004-2024, Epic Games, Inc. Unreal and its logo are Epic’s trademarks or registered trademarks in the US and elsewhere.
For more details read [here](https://forums.unrealengine.com/t/migrating-optional-epic-games-git-repositories-to-new-github-organization/1718666).

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