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Setting Up EL Launcher

The Eagle Launcher (EL) allows you to stream your Unreal Engine applications directly from your own hardware.

Prerequisites

  1. Download the EL (i.e. the zip file) to your C: Drive. Click here to Download the EL.

  1. Make sure there is enough disk space on your C drive as the App will be stored in C:\e3ds_streaming_apps folder

 

To determine the needed space for the App, follow this rule:

The Required space = zipped App size + extracted App size + the biggest available extracted App size.

Machine requirements

  1. A powerful machine/ VM with a GPU is required with Windows OS images.png (Windows 10, 11 or Server).

  1. A good Internet Connection.

All GPUs are supported but some Apps may Not Stream from a machine with an RTX 2080.

Warning: Running 4.27 Unreal Engine App in an AMD GPU like rx580 8GB will make the App crash or get an Amf related error.

Installation Instructions

Download and install the following:

  • Install the Unreal Engine 5.5 prerequisites from here.

  • Install the Unreal Engine 5.6 prerequisites from here

  • Install 7-Zip from here.

In your Computer :

  1. Go to “Control Panel\System and Security\System”

  1. Click on “Advanced system settings“

  1. Click on “Environment Variables“

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Image 1. Control Panel : System and Security : System : Advanced system settings : Environment Variables

  1. Select each path and click “Edit”. (See image below).

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Image 2. Select each path. Click Edit

  1. Click ‘'New’' (Image 3)

  1. Add a new entry “C:\Program Files\7-Zip'' (i.e. installation folder where the 7-zip software is installed).

image-20240521-124343.png

Image 3. Click New. Add C:\Program Files\7-Zip

  1. Click OK in all open Control Panel windows to save the changes.

  1. Restart the instance.

  1. Go to C: Drive on your Computer to the EL.zip. (previously downloaded from the Control Panel to the C: Drive).

  1. Extract the EL.zip folder.

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Image 4. EL.zip extracted

  1. Double-click the EL.exe file. This will create a config_EL.json file. Once the file is created, close the EL.exe application.

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Image 5. Created JSON File

  1. Collect your apiKey ( follow this document : Getting API Key)

  1. Open the config_EL.json with Notepad (Image 6)

  1. Paste the apiKey in the config_EL.json file

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Image 6. Paste the API Key

  1. Save the config_EL.json file.

  1. Double-click the EL.exe file.

  1. A terminal window will appear. Wait 1 to 2 minutes (i.e. the time to connect the machine to Eagle 3D’s system until the message “Ready to serve pixel streaming“ appears).

    image-20251030-032804.png

    Image 7. Terminal Window ready for streaming

Now you have finished the EL Launcher setup successfully!

  1. Check the Observer to verify whether your streamer machine is connected to our system or not.

    In the image below, you can see a machine named DESKTOP-EKDM1D2 connected to the Eagle system. This confirms that the machine is successfully connected and can now be used as a streamer machine.

    Observer: https://connector_binary.eagle3dstreaming.com/API/observer


    image-20260113-043723.png

    Image 8. Observer

The machine where you set up EL.exe it will work as streamer machine. You can stream from any other device using your app streaming url. You just need to keep running the EL.exe in your streamer machine.

  1. Go to Control Panel

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Image 9. Control Panel

  1. Now upload and stream your app (Tutorial)

  1. If you are not a Pay Per License user, please construct your Pixel Streaming URL using the following format:

    CODE 
    https://connector_binary.eagle3dstreaming.com/v5/<username>/<appName>/<configName>

Example URL: https://connector_binary.eagle3dstreaming.com/v5/demo/myDemoApp/default

URL Parameters Explanation:

  • username: Your Eagle 3D Streaming account username.

  • appName: The name of the application you want to stream. This application must be uploaded to your Eagle 3D Streaming account.

  • configName: The configuration name created in the Eagle 3D Streaming control panel.

  1. When you access the streaming URL, the system automatically creates a folder named C:\e3ds_streaming_apps on your local drive. This folder stores the applications downloaded from Eagle’s system for streaming.

    image-20260113-045426.png

    Image 10. e3ds_streaming_apps Folder




  2. After accessing the streaming URL, please check the Observer.

    In the image below, you can see a client from Bangladesh running the E3DS_StarterApp on the connected streamer machine.

    Observer: https://connector_binary.eagle3dstreaming.com/API/observer

    image-20260113-045348.png

    Image 11. Observer View Showing Active Client and Running Application




  3. When you play the app for the first time, it will enter the Acquiring & Preparing Phase — downloading & extracting the app from Eagle’s system to your machine.
    From the second run onward, the app will launch instantly.

If the App is running, then the setup was successful. If not, you will get errors. Please contact Support.

Notes

One running EL can serve only one user at a time. (1 CCU per License).

 

Please keep the terminal window open because closing it will stop the stream.

Don’t click inside the EL’s black window or any other window started by the stream. If clicked by mistake, just press the Esc button one time.

  

It is possible to start more than one “EL.exe“ in a single PC to run multiple stream from the same PC but this might cause poor streaming experience due to the lack of hardware resources like CPU, GPU or RAM.

 

Tip : On Sleep mode, the Stream stops. You need to make sure the EL is running non stop. You can change it from your computer’s settings.

 

 

Troubleshooting

 

 

Issue

Possible Causes

Solutions / Steps

EL.exe does not start or closes immediately

Prerequisites not installed; 7-Zip not in PATH; EL.exe not run as admin

  • Install Unreal Engine 5.5/5.6 prerequisites and 7-Zip

  • Add C:\Program Files\7-Zip to system PATH

  • Restart machine

  • Run EL.exe as Administrator

  • Contact Support

“Ready to serve pixel streaming” does not appear

Internet issue; incorrect apiKey; licenses not active

  • Check internet connection and firewall

  • Verify apiKey in config_EL.json

  • Confirm Pay Per License plan is active

  • Wait 1–2 minutes after launch

  • Contact Support

App fails to download / stuck in Acquiring Phase

Insufficient disk space; folder permissions; app not in Control Panel

  • Ensure enough disk space on C: drive

  • Verify read/write permissions for C:\e3ds_streaming_apps

  • Confirm app exists in Control Panel

  • Restart EL.exe and retry

App crashes after launch

Unsupported GPU; Unreal Engine compatibility issues

  • Check GPU support and update drivers

  • Avoid AMD RX580 8GB for Unreal 4.27 apps

  • Be cautious with RTX 2080 GPUs

  • Close other GPU-intensive applications

Black screen / no video in stream

EL.exe window closed; accidental clicks in terminal

  • Keep EL.exe terminal window open

  • Avoid clicking inside EL or Unreal windows; press Esc once if clicked

  • Ensure only one user per EL instance (1 CCU per license)

Stream stops unexpectedly

Machine entered Sleep Mode; EL.exe closed

  • Disable Sleep Mode in Windows power settings

  • Ensure EL.exe is running in background

Poor streaming performance

Multiple EL instances; limited hardware resources; network issues

  • Avoid running multiple EL instances unless CPU/GPU/RAM allow

  • Use wired internet connection

  • Close unnecessary background applications

Need help?

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