OBS Guide

Before installing OBS please do a speed test using http://speedtest.xcdnpro.com This will test your connection with our servers.

Based on your results here are our recommendations regarding the resolution and Bitrate (you will need to set this once you configure OBS)

Upload Speed Resolution Bitrate
higher than 9Mbits /s 1920×1080 4000 Kbps
between 5Mbits and 9 Mbits 1280×720 3000 Kbps
between 3Mbits and 5Mbits 960×720 2500 Kbps
between 2Mbits and 3Mbits 800×600 2000 Kbps
less than 2Mbits 640×480 1000 Kbp
  1. Download OBS software from https://obsproject.com/download 
     Please Note: There is a phishing campaign at the moment that encourages downloading OBS from non-official sites. Please make sure you download the version available on the official website only
  • Select the Operating System (Windows / MacOS / Linux)
  • Click on Download Installer
  1. Once the download is finished, install the application
  2. Open OBS software
  3. The first time you open OBS you will be asked if you want to Auto Configure OBS → Click CANCEL
  1. Click on + To add a new Video Source
  • Select Video Capture Device
  • Input desired name
  • Check “Make source visible
  • Click OK
  • Device: Select desired Webcam (ex: Logitech C920)
  • Check “Use Preset
  • Resolution: Select the Recommended resolution based on the speed test
  • Frame rate: 30
  • Click OK
  1. Click On SETTINGS
  • Choose the STREAM TAB
  • Select Service → Show All… → CAM4

  • Select Server → CAM4

  • In order to get the Stream Key you need to open the Broadcast Window on Cam4
  • Choose External Encoder
  • Choose Get Stream Key
  • Copy the Stream Key
Choose External Encoder
Choose Get Stream Key
Copy Stream Key
  • Paste the Stream Key from cam4 into the input field
  • Choose the OUTPUT TAB
  • Go to Output Mode – Select Advanced from the dropdown list

IF Encoder is x264 use the following settings:

  • Rate Control: CBR
  • Bitrate: The one recommended (see above table)
  • Keyframe Interval (seconds, 0=auto): 1
  • CPU Usage Preset (higher=less CPU): superfast
  • Profile: main
  • Tune: zerolatency
  • x264 Options (separated by space): bframes=0 b-adapt=0 partitions=none scenecut=0 no-weightb weightp=0 sliced-threads  Note:! For x264 options you need to copy+paste the values manually

IF Encoder is QuickSync use the following settings:

  • Check the box for Enforce streaming service encoder settings
  • Target usage: balanced
  • Profile: main
  • Keyframe Interval (seconds, 0=auto): 1
  • Async Depth: 1
  • Rate Control: CBR
  • Bitrate: The one recommended (see above table)
  • B frames: 0
  • Check the box for Content Adaptive Quantization
  1. Choose the VIDEO TAB
  • Base (Canvas) Resolution: Use the recommended resolution based on the speed test (ex: 1280×720)
  • Output (Scaled) Resolution: Use the same resolution as the Base (Canvas) Resolution
  • Downscale Filter: Bilinear
  • Common FPS Values: 30
  1. Choose the ADVANCED TAB
  • Scroll down to Network Area and check the following box: “Dynamically change bitrate to manage congestion”
  1. Click OK
  2. Click Start Streaming
  1. Open Broadcast window on CAM4 → Select External Encoder
  2. Allow flash (if it asks for it 1.1)
  3. Click Start Broadcast (1.2)

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