Chroma Key

by kmmtinc
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KineMaster’s Chroma Key tool is powerful and flexible. Using it is as easy as flipping a switch. Creating a project that uses Chroma Key isn’t hard, but there are some things you should know. 

To create an effective Chroma Key effect, you will need two images or videos. One will be your background, the other will be the foreground. In KineMaster, the background image or video always needs to be imported into the Primary Timeline. 

To add media to the Primary Timeline, tap the Media button at the top of the Media Wheel. Use the Media Browser to find the background you want to use, tap it to add it to the Timeline, then tap the checkmark to close the Media Browser.

Now, tap the Layer button and then tap the Media button. Select the image or video that has a green (or blue or red) background. 

Close the Layer Media Browser and tap the media layer to select it. Choose Chroma Key from the Options Panel, then tap Enable. The solid background from the media layer will vanish, replaced with your Primary Timeline background.

Troubleshooting Chroma Key:

My green screen footage looks “noisy.”

Depending on how well lit your green screen footage is, shadows in the backdrop may cause noise to appear in your video. To fix this, move the Playhead to a point in your project where you can clearly see the noise. 

Tap the Show Mask button. This allows you to see what has been removed from your media layer. White areas are visible. Black areas are removed. 

Use the foreground (top) and background (bottom) sliders above the Show Mask button to adjust your Chroma Key mask until the noise has been removed. 

The edges of my actor are “fuzzy.”

If your actor is too close to the green screen, the green screen can reflect green light back. This makes it difficult for KineMaster’s Chroma Key tool to accurately identify what should be removed. 

Follow the steps to show the mask and adjust the foreground and background mask. Then, tap the Detail Curve tool. You can experiment with different positions of this tool to bring detail back to the edges of your actor. 

I want to select the color to remove.

KineMaster automatically guesses the color you’d like to remove from your media layer. Sometimes it gets it wrong, or sometimes you may want to experiment with improvements that may come from adjusting that color.

To do this, tap the Key Color button. You have three different ways to pick a new color. There are default “best guess” colors in the top color picker tab. The middle tab gives you the option to select from an HSB spectrum map. The bottom tab lets you adjust the RGB values of the color. 

Key Colors work best if they are set to the most saturated version of the color you want to remove. If you select a color that contains black or white values, the Chroma Key tool will struggle to create a clean mask. 

When I import a media layer, it appears grayed out, with diagonal lines through it. 

KineMaster relies on your phone or tablet (or Chromebook!) to do a lot of the heavy lifting. If you are using KineMaster on an older or budget device, the processor inside may not be powerful enough to support video layers. 

If you run into this problem on an Android device, there are some additional troubleshooting steps you can take.

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