It’s quite an intensive process and you’ll need a reasonably powerful computer or phone to do this. On a basic level, they take your video (for example your camera or a pre-recorded video) and stream it to your destination. These tools are called a variety of fancy names such as “live streaming video encoders” and “live video tools”. And there are some big advantages and extra features you’ll get if you use another tool. This means you don’t have to use a 3rd party tool - and it’s very easy.īut some platforms (such as LinkedIn Live) require you to use a 3rd party tool. Many of the main live video platforms such as Facebook and YouTube have this facility built in to their web or mobile apps. This will take your video and audio and broadcast it to the platform which in turn will broadcast it out to your audience. To broadcast live to a platform like Facebook, LinkedIn or YouTube, you’ll need an app. This means you could switch between different hosts and guests, pre-recorded videos and more. Most live video tools allow you to switch between different layouts or scenes. You could just live stream one camera all the way through your live stream. #Chroma key live broadcast how to#If you'd like to try using a recorded webcam stream as your foreground source, check out our guide on How to Record Webcam Stream as a Video File.Live streaming tools have two main features - switching and streaming. You want to make sure (whatever your background source) that it is (1) solid (2) well-lit and (3) with as few shadows as possible. Just make sure that when planning to replace your Live stream background using the chroma key effect that you take the "big three" factors into account. Now that you have seen how to add media and modify the background using the chroma key effect, you're ready to experiment with other types of source files. We've used a still frame image for this guide because it's easier to illustrate. It's important to note that this is just one of many methods available to modify your Live webcast using the chroma key effect. Alpha Threshold at 0 Alpha Threshold at 220 Alpha Threshold at 255 What's Next? Moving the slider toward zero will gradually fade the background source out making lighter and more transparent. By default, this is set to 255 or fully-opaque. Careful though, add too much, and the green that you worked to remove will bleed back into the image.Īlpha Threshold lets you control the transparency of your background media source. Black Threshold at 0 Black Threshold at 100Īs you can see in this example, adjusting the Black Threshold can help to smooth out rough edges by controlling how strong your subject appears. Use the slider to increase or reduce image saturation. However, there are exceptions to every rule, and you may discover that your subject needs a bit of adjustment. Notice how it is preset to a value of 75? This is usually a good blend. Practice with both to discover which works best for you!īlack Threshold lets you control how dominant your subject image will be in the foreground. Most experts will suggest that green is easier to work with, but there are situations in which choosing blue can make a big difference. These options let you adjust the look of your finished visual presentation.Ĭolor lets you choose between a green or blue background. You can fine-tune the chroma key visual effect by using the options located below the preview frames in the Transparent Video interface. To help you create a chroma key effect with AlterCam, we've put together a brief how-to guide. The subject in the foreground remains the same, while what is seen behind them can change dramatically often providing cool - seemingly impossible effects! Both blue and green backgrounds make it possible to work with this effect. Videographers will often film their subjects in front of a green backdrop with a plan to replace the green color with a different image of their choosing. Green is often the color that editors choose to isolate and remove because the subjects of most chroma key video sequences are human, and green is not a color that naturally occurs in the human complexion. What the chroma key technique allows editors to do is pick a single color from the spectrum and remove it completely from their screen. If you've ever heard people mention the term "green screen" it's the same thing. Without a doubt, "Chroma keying" is one of the most exciting video editing tricks available today.
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