Epic Games recently introduced Pixel Streaming Plugin 2 (PSP2), which brings major architectural changes and improvements to Unreal Engine’s Pixel Streaming system.

Eagle 3D Streaming now supports Pixel Streaming Plugin 2. However, based on extensive internal testing and customer reports, there are important compatibility considerations you should understand before deploying applications publicly.

Figure 1. Pixel Streaming Plugin 2

Current Compatibility Status

Unreal Engine Version	Pixel Streaming Plugin	Status

Unreal Engine Version	Pixel Streaming Plugin	Status
UE 5.7	PSP2	✅ Recommended
UE 5.5	PSP2	⚠️ Known Streaming Issues
UE 5.6	PSP2	⚠️ Known Streaming Issues
UE 5.5 / 5.6	PSP1	✅ Stable Alternative

Main Known Issue

Applications built with:

Unreal Engine 5.5
Unreal Engine 5.6

using:

Pixel Streaming Plugin 2

may experience a critical issue where:

The WebRTC connection successfully negotiates, but the video stream fails to start (Figure 2)

Figure 2. Video Stream Failed

Why This Happens

The issue appears to be highly dependent on:

Geographic region of the streaming machine
Geographic region of the end user

This behavior originates from Epic Games’ Pixel Streaming Plugin 2 implementation in Unreal Engine 5.5 / 5.6.

Eagle 3D Streaming only replicates Epic Games’ Pixel Streaming infrastructure and behavior. Therefore, this issue is not platform-specific and also occur when using Epic’s own signaling server and infrastructure directly.

Real-World Example

Let’s say:

Your application is hosted in the USA (Streamer Machine Location is in USA)
The app is built with:
- Unreal Engine 5.5 or 5.6
- Pixel Streaming Plugin 2

User Connection Results:

Streamer Region	User Region	Result

Streamer Region	User Region	Result
USA	USA	✅ Usually works
USA	Europe	❌ Video stream may fail
USA	Asia	❌ Video stream may fail

Similarly:

Streamer Region	User Region	Result

Streamer Region	User Region	Result
Europe	Europe	✅ Usually works
Europe	USA	❌ Video stream may fail
Europe	Asia	❌ Video stream may fail

Recommended Production Setup

Setup	Recommendation

Setup	Recommendation
UE 5.7 + PSP2	✅ Best Option
UE 5.5 / 5.6 + PSP2	⚠️ Use with caution
UE 5.5 / 5.6 + PSP1	✅ Stable Alternative

Important Note About Internal Testing

Many teams do not immediately notice this issue because:

Local testing often works correctly since both the streamer and browser are under the same network and geographic location

As a result, applications may appear to function correctly during development and internal QA testing.

However, the issue becomes significantly more visible during:

Public deployments
Global user access
Cross-region streaming scenarios

This is why some applications work perfectly during internal testing but experience video stream failures after being deployed to users in different geographic regions.

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