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After Effects background tutorial

After Effects Tutorial: How to Select and Remove Objects in a Video


After Effects is a phenomenal tool for working with video footage in post production. And while many editors and effects specialists use the program to add CGI or effects, the program is just as useful for removing unwanted elements from recorded video.

In this tutorial from our comprehensive 17-hour Adobe After Effects training video course, you’ll learn how to use the Roto brush tool to isolate foreground and background elements and manipulate them however you’d like.

rotobrush1Getting Started with the Roto Brush tool

The Roto Brush tool will let you select the element in a video that you’d like to manipulate and remove. To activate the tool, hold the Alt or Option key and click W on your keyboard, or select an active Layer, and find it in the layers toolbar above the editing window, as shown below.

rotobrush2The Roto brush has two modes, one for selecting foreground elements (the object you want), and one for selecting the background (everything around it). You can switch to the background editing mode by holding the Alt (Windows) or Option key (Mac). The tool’s crosshairs are green when in foreground mode, red when in background selection.

Find a representative frame in your video sequence, and use the crosshairs to broadly ‘paint’ the item you want to isolate, as shown below.

rotobrush3When you release your mouse button, the tool will try to automatically detect the edges of the object you selected. The detection is good, but not perfect. In places where it went too far, you can can bring the selection area back in using the background selection mode.

The goal is to get as close as you can, changing the size of the brush to highlight smaller areas that first weren’t picked up, such as the subject’s ears in our example, and removing selection areas that have gone too far with the alternate selection mode.

The Roto brush is able to follow the movement of a selected object within a scene, but, once again, you’ll want to verify how well the automatic detection works. Use the



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FAQ

Lala
Photoshop tutorial to create this background effect?

Is there a photoshop tutorial for replicating the type of effect used to produce the "red swirly background" on this page? (I'm not talking about the floral prints, just the red background on that image.)

http://jsbox.net/


Thanks!

Note: site takes forever to load cause of java scripting,

red swirl effect,
you say the shape of the swirl, and not pattern within, you could mask that area or outline with pen tool and convert, then place as overlay to pattern the apply to photos, also could design in illustrator, then open in photoshop later,
..

j
Adobe after effects background change?

Is it possible to change the background of a video on adobe after effects, like for example someone playing guitar.. then make it look as though there playing on a concert stage ?

thanks

I am pretty sure that is what the "blue screen" feature is for. You just ad the other footage to the back ground using a combination of Premier and After effects.

Just Google for After effects tutorials - I did.

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