UE5 Pixel Streaming SDK 中文 English

Compared to EpicGame's heavily-designed SDK for Pixel Streaming, peer-stream.js is a lightweight WebRTC library with 0 dependency, containing a frontend component (using WebComponents API), along with a signaling server (using NodeJS).

• peer-stream.js: browser SDK for player
• signal.js: node.js signaling server
• signal.json: configure signal.js
• signal.html: GUI for signal.js and example for peer-stream.js

Demo

# install WebSocket
npm install ws@8.5.0

# start Signaling Server
node signal.js

# start packaged UE5
start path/to/UE5.exe -PixelStreamingURL="ws://localhost:88"

# visit webpage
start http://localhost:88/signal.html

signal.json

env	type	default	usage
PORT	number	88	WebSocket/HTTP port for player & UE5
UE5	string[]	[]	run command when player connected (UE5 auto start)
one2one	bool	false	one-to-one mapping for player & UE5
auth	string	''	HTTP Basic Auth username:password
boot	bool	false	node signal.js on system boot
exeUeCoolTime	number	60	Time interval between starting the same UE instance again next time
preload	number	1	Number of pre started UE instances

Load Balance

signal.js accept multi UE5 & player connections, where each UE5 maps to multi-players with load-balancing. Turn one2one on to keep one-to-one mapping. Provide UE5 to start UE5 automatically. All configs in signal.json.

Unreal Engine

enable the plugin:

Plugins > Built-In > Graphics > Pixel Streaming > Enabled
Editor Preferences > Level Editor > Play > Additional Launch Parameters
start path/to/UE5.exe -{key}={value}

common startup options:

 -PixelStreamingURL="ws://localhost:88"
 -RenderOffScreen
 -Unattended
 -GraphicsAdapter=0
 -ForceRes
 -ResX=1280
 -ResY=720
 -PixelStreamingWebRTCFps=30
 -Windowed
 -AudioMixer
 -AllowPixelStreamingCommands
 -PixelStreamingEncoderRateControl=VBR

peer-stream.js

HTML:

<script src="//localhost:88/peer-stream.js"></script>
<video is="peer-stream" id="ws://127.0.0.1:88/"></video>

or JavaScript:

<script type="module">
import "//localhost:88/peer-stream.js";
const ps = document.createElement("video", { is: "peer-stream" });
ps.id = "ws://127.0.0.1:88/";
document.body.append(ps);
</script>

Messages

sending messages:

// object will be JSON.stringify()
ps.emitMessage(msg: string | object);

receiving messages:

ps.addEventListener("message", e => {
    // JSON.parse(e.detail)
});

Requirement

• Google Chrome 90+
• Unreal Engine 5.0.3
• NodeJS 14+
• npm/ws 8.0+

© MIT License

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