Kdenlive/Manual/Transitions/Composite/ru: Difference between revisions

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Переход Композитный

Переход Композитный служит для объединения двух клипов на разных видеодорожках в один. Этот переход используется в сочетании с данными альфа-канала, содержащихся в эффектах Обработки альфа-канала или с использованием Файла вытеснения. Данные альфа-канала указывают, каким образом будут скомпанованы два клипа на разных видеодорожках. Пока вы не определите некоторые данные альфа-канала, используя эффект Обработки альфа-канала или Файл вытеснения, изменения в настройках перехода Композитный не будут иметь видимого эффекта.

Примечание: недостатками перехода Композитный являются потеря яркости и неточный контроль настройки положения. По сравнению с аффинным, композитный переход не поддерживает вращение и наклоны, но он намного быстрее, хотя и за счёт потери яркости.

Alpha operations

Операции Альфа-канала НАД, И, ИЛИ и Исключающее ИЛИ

Operation Over

The clip with alpha information is located on the top track: the selected color acquires transparency.
The clip with alpha information is located on the bottom track: we see only the top clip.

Operation And

The clip with the alpha information is located on the top track: the selected color becomes transparent.
The clip with alpha information is located on the bottom track: everything in the image becomes transparent, except for the selected color.

Operation Or clears any alpha information

Operation Xor

The clip with alpha information is located on the top track: everything in the image becomes transparent, except for the selected color.
The clip with alpha information is located on the bottom track: the selected color acquires transparency.

Tutorial 1

See this tutorial that describes how to use:

Alpha Manipution -> Blue Screen

rotoscoping

Composite Transition.

Crop and Transform -> Pan and Zoom effect

Enhancement -> Sharpen Effect

Alpha Manipulation -> Alpha Operations

Tutorial 2 - composite transition and Blue Screen

Tutorial showing how to use the "Blue screen" function, composite transition and Keyframes to animate one image moving over another in the Kdenlive video editor.

Tutorial 3 - Video Masks

This tutorial uses the Composite transition and a custom video mask (a.k.a. a Wipe File or matte) to create an effect where you can make it appear that one video is playing on the screen of a still of a computer monitor.

The mask/matte is created with GIMP.

Save your mattes to /usr/share/kdenlive/lumas.

It would appear that you need to stop and restart Kdenlive in order for it to pick up new matte/wipe files saved in the above directory.

There appears to be a defect in this functionality which means that when the composite is on 100% Opacity, the wipe file does not work. You need to change it to 99% to make the effect kick in.

Screenshot of Composite transition using a custom wipe file to mask out a section of video - as described in Tutorial 3.

Aspirational goal - a compositing experiment made using detonation films free sample effects.

@@ Line 6: / Line 6: @@
 Примечание: недостатками перехода Композитный являются потеря яркости и неточный контроль настройки положения. По сравнению с аффинным, композитный переход не поддерживает вращение и наклоны, но он намного быстрее, хотя и за счёт потери яркости.
+==== Alpha operations ====
 [[File:Composite transition showing alpha channel operation options_ru.png|400px|left]]
@@ Line 12: / Line 14: @@
 <br style="clear: both;"/>
-[[File:Over alpha operation.png|300px|left]]
+Operation '''Over'''
-''НАД'' выполняет эту операцию (если вы не столкнулись с проблемой во время предпросмотра См. ниже [[Special:myLanguage/Kdenlive/Manual/Transitions/Composite#Hint_for_previewing_the_alpha_manipulation_effects| описание и решение]]).
+# The clip with alpha information is located on the top track: the selected color acquires transparency.
-<br style="clear: both;"/>
+# The clip with alpha information is located on the bottom track: we see only the top clip.
-[[File:Xor alpha operation.png|300px|left]]
-''Исключающее ИЛИ'' выполняет эту операцию (если вы не столкнулись с проблемой во время предпросмотра. См. ниже [[Special:myLanguage/Kdenlive/Manual/Transitions/Composite#Hint_for_previewing_the_alpha_manipulation_effects| описание и решение]]).
+[[File:alpha_operation_Over.png]]
-<br style="clear: both;"/><br />
-I am not sure I understand what the ''And'' and ''Or'' Alpha operations do.
+Operation '''And'''
+# The clip with the alpha information is located on the top track: the selected color becomes transparent.
+# The clip with alpha information is located on the bottom track: everything in the image becomes transparent, except for the selected color.
-==== Hint for previewing the alpha manipulation effects ====
+[[File:alpha_operation_And.png]]
-The preview in the Project Monitor goes all strange when you select the Composite transition in the timeline or the Video 1 track in the timeline. (This is fixed on mantis #[http://www.kdenlive.org/mantis/view.php?id=2990 2990]  [http://quickgit.kde.org/?p=kdenlive.git&a=commit&h=e692395e685251de32144abfdf85b6c57319c41b 24 Feb 2013])
+Operation '''Or''' clears any alpha information
-[[File:Weird preview look.png|400px|left]]
+[[File:alpha_operation_Or.png]]
-What the Project Monitor looks like when you have just selected the Composite transition in the timeline. This is not what the rendered video will look like.
+Operation '''Xor'''
+# The clip with alpha information is located on the top track: everything in the image becomes transparent, except for the selected color.
+# The clip with alpha information is located on the bottom track: the selected color acquires transparency.
-To get a look at what the video will render as, you need to click Video 1 and then Video 2 in the timeline.
+[[File:alpha_operation_Xor.png]]
-<br style="clear: both;"/>
-[[File:Two tracks composite transition with alpha info.png|400px|left]]
-What the preview looks like once you select Video 2 in the timeline. This is what the rendered file will look like
-<br style="clear: both;"/>
-<br />
 ==== Tutorial 1 ====
@@ Line 68: / Line 64: @@
 The mask/matte is created with '''GIMP'''.
-Save your mattes to <tt>/usr/share/kde4/apps/kdenlive/lumas</tt>.
+Save your mattes to <tt>/usr/share/kdenlive/lumas</tt>.
 It would appear that you need to stop and restart '''Kdenlive''' in order for it to pick up new matte/wipe files saved in the above directory.