Chroma keying may be the expression used for shooting video against a blue or eco-friendly screen, making the backdrop color transparent, and superimposing it more than a still image or any other video.
It’s broadly utilized in TV and films, with actors filmed before a colored backdrop inside a studio, which is then substituted for footage shot on location elsewhere, but you should use exactly the same technique both at home and it’s much simpler than you may expect.
There are many free video editors able to Chroma keying, but our favorite free video editor Lightworks tends to own the best results. Here is how to get it done.
1. Record your video
First, you’ll need an eco-friendly or blue background to shoot against. As we’ll explain later, it doesn’t need to be a really specific shade, but it must be substantially not the same as the topic you’re shooting. You may have seen times when a weather presenter’s tie has made an appearance transparent throughout a broadcast. It is because the fabric was too near the coast color towards the backdrop, or even the key wasn’t quite set precisely enough.
You may make your personal backdrop utilizing a sheet, or perhaps a large piece of paper or card. If you’re intending to make videos frequently, you will find affordable Chroma key backdrops available which incorporate a frame to hold the material from. If space is restricted, collapsible screens can also be found beginning around US$40. These screens will also be handy for photography.
Good lights are essential. You’ll need make certain the screen evenly lit therefore the color is consistent. You’ll want to be sure that your subject is way enough in the screen to prevent shadows and color spill (once the blue or eco-friendly backdrop reflects off your subject).
2. Import and trim
Once you have shot your video, install Lightworks. It’s free for private use, but you’ll have to sign up for a forex account if you wish to apply it more than thirty days.
Click on the button marked Produce a New Project, provide a reputation, and choose a frame rate (you’ll find this by right-clicking your recorded video deciding on the facts tab). Here we are utilizing a still image like a background, but you may also use another video. Import this exactly the same way.
Click on the Edit tab and drag your video in the Project Contents panel to the V1 tabs on the timeline below. Should there be undesirable footage at the start or finish of the clip, right-click it and choose Trim In or Trim Out, then make use of the yellow handles to alter in which the clip starts and finishes.
Right-click on the preview window marked Sequence #1 and choose Tracks > Add Video. Drag your online video in to the V1 track as well as your still image into V2. Click and drag the best-hands side from the image within the V2 track until it is the same length because the video.
3. Set the key
Now click on the VFX tab, choose the V1 track within the timeline and click on the tab marked having a plus icon. Click on the Favorites drop-lower menu and choose Key, adopted by Eco-friendly Screen. Click Add Effect and you will visit a new panel of settings underneath the color correction wheels.
Make use of the eye dropper tool around the left to decide on the background you need to remove. This can typically do a significant good job alone, but it’ll need some fine tuning. Try sliding the Saturation and Luminance sliders and modifying their steepness while using handles that appear whenever you move your mouse them over. You’ll find that each adjustment you are making includes a knock-on impact on the alterations you have made using the other sliders it’s dependent on balancing the 3 to offer the best effect, preserving detail while minimizing spill.
To determine the way the filter is working, click on the ‘Reveal’ box. The white-colored areas would be the areas of the recording that’ll be removed, and also the black areas would be the parts which will remain.
The Remove Spill slider will prove to add a crimson tint to neutralize eco-friendly tones in areas that require it.
4. Tweak and export
Once you are happy, you should use Lightworks’ other VFX tools to create other changes like color correction and popping. When you are done, go back to the Edit tab, right-click on the preview window at the very top right and choose Export.
The only real two export options you will see within the free form of Lightworks are Vimeo and YouTube, but this can be a little misleading. These can save the recording for your Mac or pc inside a MP4 format, however they will not perform the uploading for you personally unless of course you look into the appropriate box.
Pick a destination folder and reputation for your video file and click on ‘Start’. The processing will start, and you will visit a progress bar at the very top right. This will run without anyone’s knowledge so that you can continue caring for your project, and you will be notified when it is complete.