Archive:Kdenlive/Manual/Effects/Alpha manipulation/Blue Screen

Blue Screen

FilterFrei0r-bluescreen0r

This effect allows you to do Chroma Keying (Chroma key compositing/Green Screen) on Kdenlive

Tutorial 1

Youtube video on Chroma Keying which uses the Blue Screen effect

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Tutorial 2

Another video on chroma keying / green screen. This one also shows you how to use rotoscoping to remove stuff you do not want from out of your frame. It also means you don't need to fill your whole frame with the green screen either.

Also uses

• Composite Transition.
• Crop and Transform>Pan and Zoom effect
• Enhancment>Sharpen Effect
• Alpha Manipution>Alpha Operations

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Tutorial 3

Tutorial showing how to use the "Blue screen" function and keyframes to animate one image moving over another in the KDEnlive video editor

Also uses

• Composite Transition
• Keyframes

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Tutorial 4

Shows usage of the following effects: blue screen, alpha operations - shrinkhard, denoiser and keysplillm0pup

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See also

See also keysplillm0pup effect in the Misc group. The keyspillm0pup effect can be used to improve the edges of the blue screen effect - when edge problems are caused by "keyspill". Keyspill is when the colour of the screen used for colourkeying spills onto the subject due to light reflection.

See also Frei0r - select0r which also does color based alpha selection. This might not come installed on Kdenlive by default.

see this thread for some discussion on chroma keying issues in Kdenlive