How-To: Chromakey (greenscreen) streams & recordings for OBS

[Miff-Real]

Overview

This how-to explains how you can use the Chromakey module to create a greenscreen effect in the OBS software. This effect allows you to selectively remove or make transparent, parts of the video or stream. You can then optionally show a secondary video feed in these areas.

Module Setup in VCV Rack

• Add the Chromakey module to your patch and position it where you would like the greenscreen effect to be, you can use multiple instances of the module
• Choose a colour for the module that is the least present on the screen, I find Magenta usually works
• Turn on the Lock Colour and Bypass Room Brightness settings
  
• Note: not all instances of the Chromakey module have to be used the same, you can add more instances and set them to different colours

OBS Setup

• First you will need to have a source for VCV Rack, so add a Window Capture
  
  
• If you want to replace the Chromakey module with a different feed, you will also need to setup a source for that content, in these screenshots I have a MidJourney image set as my alternative source
• Make sure your alternative feed source is below the VCV Rack source in the menu
  
• Now right-click on that VCV Rack source and select the Filters option
• Add a filter of the type Chroma Key
• You can fiddle with the settings to alter what gets removed and what stays, but the default settings for Magenta are pretty good
  
• As soon as you apply the filter you should be able to see your second source through the areas removed by the Chromakey effect
• Now just resize the secondary source as needed and you are ready to record or stream
  
• Don't forget to add an Audio source :-)
• ...and post your cool videos over here