How to Use Blue Screens

This wikiHow teaches you how to shoot a video with a green screen so you can easily add a custom background. After recording with a green screen, you can replace the green background with a custom image or video through Shotcut or LightWorks, both of which are free and available for Windows and Mac computers.

Table of Contents

Video recording with green screen

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Set green screen. You can purchase industry-standard green backdrops online, or use a green paper/poster instead if needed. ^{[1] X Research Source}

The background should be as flat as possible, and at the same time must have a uniform blue color.

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Place the subject from 1 to 4.5 m from the background. 1 m is the minimum distance between the object and the background to minimize the shadow, this factor is very important in eliminating the blue screen later. For optimal results, you should estimate the distance between the subject and the background from 3 – 4.5 m, this helps to simulate the light in the background clip so that the subject looks more natural. ^{[2] X Research Source}

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Choose a location for the camera. You need to position the camera far enough to capture the entire body (if possible) in the frame, but not so far away that the green screen is out of focus. ^{[3] X Research Sources}

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Video. Capture yourself or another subject directly in front of the green screen. You need to make sure that any movement or subject is within the green screen, as any details that fall out of the background will be cut out after the video is edited.

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Transfer video to computer. After recording, you need to transfer the video to your computer for editing.

If the video is on your phone, you should consider uploading the file to a cloud service like Google Drive, then accessing the service on your computer to download it.
If the video is on the SD card, plug it directly into the computer (or the built-in USB/SD card reader) to copy the video.

Editing with Shotcut

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Download Shotcut. Go to https://www.shotcut.org with a web browser, click the Click to Download link at the top, click the download link for your operating system to start downloading the installer.

On Windows – Click 64-bit Windows installer or 32-bit Windows installer , depending on your computer’s bit count. You can check your computer’s bit count if you don’t know if the current version of Windows is 32 or 64 bit.
On Mac – Click the MacOS option located below the “macOS” heading.

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Install Shotcuts. After the installation file is downloaded, you need to proceed as follows:

On Windows – Double-click the Shotcut installation file, click Yes when prompted, click I agree , click Next , click Install and click Close . after the installation is complete.
On Mac – Double-click the Shotcut DMG file, drag the Shotcut icon, drop it into the Applications folder shortcut, and then verify the software if prompted. Then, follow the instructions that appear on the screen.

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Open Shotcuts. The application will be in the Windows Start menu or the Applications folder on the Mac.

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Turn on the “Playlist” and “Timeline” sections. Click the Playlist tab at the top of the window, then click the Timeline tab at the top. The “Playlist” section will appear on the left side of the Shotcut window, and the “Timeline” section will appear at the bottom of the window. ^{[4] X Research Sources}

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Import the video that you have shot with green screen and alternate background into the software. Click Open File at the top left of the Shotcut window, select the video you shot with a green screen and alternate background by clicking the first file, holding down Ctrl (PC) or Command ( Mac) and click the second file, then click Open in the lower-right corner. The names of the files will appear in the Playlist section.

You can use a video or image as a background instead of the original green screen.

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Create two video channels. In the Timeline section at the bottom of the window, click the menu with the three-line icon in the upper-left corner, then select Add Video Track . Then repeat the process to add a second video channel.

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Insert the video into the first channel. Drag the video recorded with the green screen from the Playlist window and drop it into the channel at the top in the Timeline section.

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Add background to second channel. Drag the background image or video to the second channel at the bottom of the Timeline section.

If you use a video as the background, it will be the same length as the original green screen shot.
If you’re using an image as a background, you’ll need to click and drag the right or left edge of the image in the timeline to stretch it to the length of the original video.

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Select video channel with green screen. This channel is at the top of the Timeline section.

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Click the Filters menu. This option is at the top of the window. The “Filters” menu will appear in the Playlist section.

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Click the ＋ sign below the “Filters” menu. A list of available filters will appear in the Playlist section.

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Click the “Video” button with the computer icon located below the Playlist section. All available video filters will appear.

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Click Chromakey (Simple) . This option is located in the middle of the Playlist window. The settings for the blue screen will open.

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Adjust the green screen distance. Drag the “Distance” slider to the right until an alternative image or video for a blue screen appears on the right side of the window.

As a general rule, you should limit dragging this slider to the “100%” mark.

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Watch the movie again. Click the triangular “Play” button located below the movie window on the right, then adjust the green screen if necessary. If you can still clearly see the green screen, drag the “Distance” slider to the right; if the custom background is not clear enough, you need to drag the slider to the left.

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Export movie. Click the File menu, choose Export Video… and then click Export File at the bottom of the menu. Enter the filename you want in the “File name” (PC) or “Name” (Mac) field, and then click Save .

The file export process can take a few minutes to several hours, depending on the size and resolution of the video.

Editing with LightWorks

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Open the LightWorks download page. Go to https://www.lwks.com with a web browser and click the blue Download Now button in the upper-right corner of the page.

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Select the operating system. Click the Windows or Mac tab, depending on the type of computer you use.

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Click the Download link for the current operating system. For Windows, you need to click Download 32-bit for 32-bit operating systems, or select Download 64-bit if your computer has 64-bit operating systems.

On Mac, click Download DMG .
Check your computer’s bit count if you don’t know if the version of Windows you’re using is 32 or 64 bit.

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Install LightWorks. After the LightWorks installation file is downloaded, you need to proceed as follows:

On Windows – Double click the installation file, click Yes when prompted, select the language then click OK , click Next , check “I accept” then click Next , click Next three more times again, enter a random number and then click Install . Click Next and then Finish when the installation is complete.
On Mac – Open the LightWorks DMG file, drag the LightWorks icon and drop it on the Applications folder shortcut, and then verify the software if prompted. Follow the instructions that appear on the screen.

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Open LightWorks as follows:

On Windows – Double-click the red LightWorks icon on the desktop.
On Mac – Click the LightWorks app icon located in the Mac Dock, or click Spotlight

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, type lightworks and then double click the lightworks result.

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Click Create a new project… . This link is in the upper left of the window.

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Project setup. In the pop-up window, do: ^{[5] X Research Source}

Enter the project name in the “Name” text field.
Select Mixed rates from the “Frame rate” drop-down menu.
Click Create .

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Click the Local Files tab. This option is located near the bottom left corner of the window.

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Select background file and video shot with green screen. Click the video with the green screen, then hold down Ctrl (PC) or Command (Mac) and click the image/video that you want to use as the background.

If you can’t find the files you want to use, click the Places button at the top, then select the folder containing the files.

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Click Import in the upper-left corner of the window. The files will be imported into LightWorks.

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Click the EDIT menu. This option is at the top of the LightWorks window, just to the right of the LOG tab.

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Create a second video track. Right-click the horizontal segment at the bottom of the window, choose Tracks from the drop-down menu, and then click Add video from the pop-up menu. The “V2” track list will appear on the left side of the window.

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Add files to the track area. Drag the video with the blue screen and drop it into the “V1” part of the track area, then drag the background image or video and drop it into the “V2” section.

If you are using a background video, the video will be the same length as the original video.
In case of using a background image, you need to click and drag the right or left edge of the image to stretch it to fit the video length.

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/6/6e/Use-a-Green-Screen-Step-36.jpg/v4-728px-Use-a-Green-Screen- Step-36.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/6/6e/Use-a-Green-Screen-Step-36.jpg/v4-728px-Use- a-Green-Screen-Step-36.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,”licensing”:”<div class=”mw-parser -output”></div>”}

Click the VFX tab at the top of the LightWorks window.

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/7/7c/Use-a-Green-Screen-Step-37.jpg/v4-728px-Use-a-Green-Screen- Step-37.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/7/7c/Use-a-Green-Screen-Step-37.jpg/v4-728px-Use- a-Green-Screen-Step-37.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,”licensing”:”<div class=”mw-parser -output”></div>”}

Add Chromakey green screen effect. Right-click the “V1” segment at the bottom of the window, click the Key category, and then select Chromakey from the menu.

Click the eyedropper in the Chromakey pane, next to the word “Saturation.”

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/c/c0/Use-a-Green-Screen-Step-38.jpg/v4-728px-Use-a-Green-Screen- Step-38.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/c/c0/Use-a-Green-Screen-Step-38.jpg/v4-728px-Use- a-Green-Screen-Step-38.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,”licensing”:”<div class=”mw-parser -output”></div>”}

Click on the blue part of the blue screen. Any colors that match this will be replaced with an image or video of your choice.

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/2/25/Use-a-Green-Screen-Step-39.jpg/v4-728px-Use-a-Green-Screen- Step-39.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/2/25/Use-a-Green-Screen-Step-39.jpg/v4-728px-Use- a-Green-Screen-Step-39.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,”licensing”:”<div class=”mw-parser -output”></div>”}

Adjust the green screen. Click and drag the “Remove spill” slider on the left side of the page to the right. This will minimize the green tint you see due to the uneven color on the original background.

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/d/dd/Use-a-Green-Screen-Step-40.jpg/v4-728px-Use-a-Green-Screen- Step-40.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/d/dd/Use-a-Green-Screen-Step-40.jpg/v4-728px-Use- a-Green-Screen-Step-40.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,”licensing”:”<div class=”mw-parser -output”></div>”}

Click the triangle Play button located below the video to preview the video.

If you need further adjustment to the blue screen, proceed with the options located on the left side of the window.

{“smallUrl”:”https://www.wikihow.com/images_en/thumb/3/30/Use-a-Green-Screen-Step-41.jpg/v4-728px-Use-a-Green-Screen- Step-41.jpg”,”bigUrl”:”https://www.wikihow.com/images/thumb/3/30/Use-a-Green-Screen-Step-41.jpg/v4-728px-Use- a-Green-Screen-Step-41.jpg”,”smallWidth”:460,”smallHeight”:345,”bigWidth”:728,”bigHeight”:546,”licensing”:”<div class=”mw-parser -output”></div>”}

Export video. To proceed, click the EDIT tab again, right-click the track and select Export . Click YouTube , uncheck the “Upload to YouTube.com” box (if selected) and then click the Start button in the lower left corner. The project will be converted to a playable video file.

Exporting the file can take a few minutes to a few hours, depending on the size and resolution of the video.

Advice

During filming in front of a green screen, it is important that the subject is completely separated from the background. You can use image or video editing tools to assist with splitting and mixing.
Never wear green clothes when filming in front of a green screen, as this will cause the clothes to blend into the background.

Warning

LightWorks is freeware, but has some features (e.g. exporting to a specific file type, such as MP4), which are locked if you don’t pay to upgrade to the Pro version.

Steps

Video recording with green screen

Editing with Shotcut

Editing with LightWorks

Advice

Warning

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