Today we're going to larn you how to go from this to this, to this while you're live streaming.... just look at them So, in order to Livestream with a greenscreen the first thing you'll need is, well, a green screen background, the background doesn't actually have to be green, it just needs to be a solid preferably bright color that's distinct from anything you'll be wearing so you could even do it with a bright red or blue background you also need a camera and some kind of video switcher or software that can "chroma-key" your background that's the technical term for removing the color in the background and replacing it with a different image.

  Now there are a few different switcher options for live chroma keying your videos but in today's setup, we'll be showing you how to do it using OBS which is free software that anyone can download for Mac or PC if you don't want to use OBS don't worry because you can still do the same thing using Roland V1-HD, Wirecast, or any of the Blackmagic ATEM switchers the process for those is very similar to what we'll be doing today so let's get started by setting up the green-screen and lighting our scene. Today we're using an Elgato green-screen which we love because it's super portable and it takes no time to set up once your green screen is set up you also need to light your scene properly just setting up the green screen and putting someone in front of it won't look so hot when you try to key out the background trust me I tried that and it did not work the lighting on the green screen has to be consistent in order for your chroma keyer to properly remove the green color in the background lighting your scene properly can vary depending on your setup.

 Ok, so once your lighting is right and your subject is framed up you can head into OBS and add your live feed. In orderto connect our camera to our laptop we're using Blackmagic Design's ultrastudio mini recorder this is a capture card that converts your HDMI or SDIsignal to Thunderbolt and allows your computer to ingest the live feed, nowthat we've connected our camera to the laptop we can add our live feed in OBSby clicking here and selecting video capture device you'll see the UltraStudio mini recorder shows up here and if you just wanted to use your laptop'scamera for this you could select that here now we can add a background in, here you have a few options depending on what you're looking to doyou can use a static image, you can use a PowerPoint feed if you're streamingan online class or tutorial of some sort, or a simple looping video if you justneed to place your subject somewhere else, today we'll just be using a simplelooping video of the first floor of our office which we can do by adding a mediasource, selecting the file on our computer, and checking loopoh and once you've added your background make sure it's layered below your livevideo feed.

  Now for the last part, the chroma key itself, simply right-clickyour camera feed and select filter go down to effect filters and select chromakey once you've created the effect you should see your subject appear withoutthe background now the default settings do a pretty good job if everything islit correctly but you're still gonna have to go in and make adjustments usingthese sliders to clean it up this is gonna take a bit of refining to get itexactly how you want it to look and which settings you adjustwill just depend on your specific lighting and background setup now weweren't able to get ours to look pixel perfect but with some tweaking it lookeda lot better once you're happy with how everything looks you can adjust the sizeof your subject and position them wherever it makes the most sense foryour scene if you're adding a looping video in the background I would highlyrecommend a couple of things: 1- that the background you're adding has thesame lighting and white balance conditions as your subject otherwise thewhole picture is going to look weird and 2- that you add a little blur toyour background so there's depth in the image which will help make it look alittle more realistic. So that's how it works!