Archive:Kdenlive/Manual/Effects/Alpha manipulation/Blue Screen: Difference between revisions

Revision as of 12:48, 2 November 2012

Blue Screen

This effect allows you to do Chroma Keying (Chroma key compositing/Green Screen) on Kdenlive. That is you can use the Blue Screen effect to generate alpha channel information allowing two video tracks to be combined using the Composite transition.

Note

Alternatively you can combine two video tracks together using the screen transition (if one of them is filmed on a black background).

Tutorial 1

Youtube video on Chroma Keying which uses the Blue Screen effect

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

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

Tutorial 4

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

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 <languages/>
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-== Blue Screen ==
+== Blue Screen == <!--T:1-->
+<!--T:2-->
 [http://www.mltframework.org/bin/view/MLT/FilterFrei0r-bluescreen0r FilterFrei0r-bluescreen0r]
+<!--T:3-->
 This effect allows you to do Chroma Keying (Chroma key compositing/Green Screen) on '''Kdenlive'''. That is you can use the Blue Screen effect to generate alpha channel information allowing two video tracks to be combined using the [[Special:myLanguage/Kdenlive/Manual/Transitions/Composite|Composite transition]].
+<!--T:4-->
 {{Note|Alternatively you can combine two video tracks together using the [[Special:myLanguage/Kdenlive/Manual/Transitions/screen|screen]] transition (if one of them is filmed on a black background).}}
-=== Tutorial 1 ===
+=== Tutorial 1 === <!--T:5-->
+<!--T:6-->
 Youtube video on Chroma Keying which uses the Blue Screen effect
+<!--T:7-->
 {{#ev:youtube|DLHa6Gkv45Q}}
-=== Tutorial 2 ===
+=== Tutorial 2 === <!--T:8-->
+<!--T:9-->
 Another video on chroma keying / green screen. This one also shows you how to use  [[Special:MyLanguage/Kdenlive/Manual/Effects/Alpha_manipulation/Rotoscoping|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.
+<!--T:10-->
 Also uses
+<!--T:11-->
 * [[Special:MyLanguage/Kdenlive/Manual/Transitions/Composite|Composite Transition]].
+<!--T:12-->
 * Crop and Transform>[[Special:MyLanguage/Kdenlive/Manual/Effects/Crop_and_transform/Pan_and_Zoom|Pan and Zoom effect]]
+<!--T:13-->
 * Enhancment>[[Special:MyLanguage/Kdenlive/Manual/Effects/Enhancement/Sharpen|Sharpen Effect]]
+<!--T:14-->
 {{#ev:youtube|_6gxHLCFhLQ}}
-=== Tutorial 3 ===
+=== Tutorial 3 === <!--T:15-->
+<!--T:16-->
 Tutorial  showing how to use the "Blue screen" function and keyframes to animate one image moving over another in the '''Kdenlive''' video editor
+<!--T:17-->
 Also uses
+<!--T:18-->
 * [[Special:MyLanguage/Kdenlive/Manual/Transitions/Composite|Composite Transition]]
 * [[Special:MyLanguage/Kdenlive/Manual/Effects#Using_Keyframes_in_effects|Keyframes]]
+<!--T:19-->
 {{#ev:youtube|M8hC5FbIzdE}}
-=== Tutorial 4 ===
+=== Tutorial 4 === <!--T:20-->
+<!--T:21-->
 Shows usage of the following effects: [[Special:MyLanguage/Kdenlive/Manual/Effects/Alpha_manipulation/Blue_Screen|blue screen]], [[Special:MyLanguage/Kdenlive/Manual/Effects/Alpha_manipulation/Alpha_operations|alpha operations]] - shrinkhard, [[Special:MyLanguage/Kdenlive/Manual/Effects/Enhancement/Denoiser|denoiser]] and [[Kdenlive/Manual/Effects/Misc/keysplillm0pup|keysplillm0pup]]
+<!--T:22-->
 {{#ev:youtube|l43Hz7YEcYU}}
-=== See also ===
+=== See also === <!--T:23-->
+<!--T:24-->
 See also [[Kdenlive/Manual/Effects/Misc/keysplillm0pup|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 color of the screen used for colorkeying spills onto the subject due to light reflection.
+<!--T:25-->
 See also [[Kdenlive/Manual/Effects/Alpha_manipulation/Color_Selection|Color Selection]] which also does color based alpha selection.
+<!--T:26-->
 see [http://www.kdenlive.org/forum/greenscreen-keying-edge this] thread for some discussion on chroma keying issues in '''Kdenlive'''
+<!--T:27-->
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 [[Category:Kdenlive]]
 </translate>