Bug 363683 - Kdenlive 16.04.1 does not permit Chroma Key
Summary: Kdenlive 16.04.1 does not permit Chroma Key
Status: RESOLVED WORKSFORME
Alias: None
Product: kdenlive
Classification: Applications
Component: Effects & Transitions (show other bugs)
Version: 16.04.0
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Vincent PINON
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-05-30 01:57 UTC by Larry Engel
Modified: 2016-08-09 10:11 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:


Attachments
Screen Capture of selecting color (677.12 KB, video/quicktime)
2016-06-19 05:27 UTC, Evert Vorster
Details
Output from chroma key (530.36 KB, video/mp4)
2016-06-19 05:30 UTC, Evert Vorster
Details

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Description Larry Engel 2016-05-30 01:57:17 UTC
Chroma Key is a major part of video editing.  It permits, for example, a speaker to be placed in a scene.  The scene on one track and the speaker video before a blue or green screen in the background.   One of the effects options under the heading Alpha Manipulation should be "blue screen".  Once the color is selected here, blue or green the background is replaced by the scene in the second video.  A reporter may be in a studio, but appear to the viewer to be in a war scene, a forest or the desert.

In Kdenlive 16.04.1 this option is not available.  Chroma Key is not possible likely because the option "blue screen"  is not in the list.  The "color selection" option removes all colors causing the speaker to totally disappear.
Comment 1 Evert Vorster 2016-06-18 20:32:02 UTC
Right-click on a clip in the timeline. 
Select "Add Effects", go to "Alpha Manipulation", and drop down to "Chroma Key"

Is this what you were after?
Comment 2 Larry Engel 2016-06-18 22:17:33 UTC
I have been using Chroma Key for a long time.  You place a "green" screen" behind your subject when shooting with the camera.  On the editor you must have the option select a matching "green" in your front clip.  The single color once selected is replaced by a second background clip.  In the Youtube.com tutorial video under "alpha Manipulation" their is now a "blue screen" option that is now missing.  You could select any shade of blue or green.  In 15.04.1 that option is missing.  There is a "select color" but no screens come up to select blue or green. What it does is select all colors and your front clip subject disappears and only the background is seen.  I wonder why I cannot select blue or green, now? 
Larry 
--- bugzilla_noreply@kde.org wrote:

From: Evert Vorster via KDE Bugzilla <bugzilla_noreply@kde.org>
To: larryengel@justice.com
Subject: [kdenlive] [Bug 363683] Kdenlive 16.04.1 does not permit Chroma Key
Date: Sat, 18 Jun 2016 20:32:02 +0000

https://bugs.kde.org/show_bug.cgi?id=363683

Evert Vorster <evert.vorster@yandex.com> changed:

           What    |Removed                     |Added
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                 CC|                            |evert.vorster@yandex.com

--- Comment #1 from Evert Vorster <evert.vorster@yandex.com> ---
Right-click on a clip in the timeline. 
Select "Add Effects", go to "Alpha Manipulation", and drop down to "Chroma Key"

Is this what you were after?
Comment 3 Evert Vorster 2016-06-19 05:27:16 UTC
Created attachment 99592 [details]
Screen Capture of selecting color

Here is a screen capture of me selecting colors in two different ways, and the background shows through.
Comment 4 Evert Vorster 2016-06-19 05:30:25 UTC
Created attachment 99593 [details]
Output from chroma key

Here is theat project, rendered, showing that plinly blue and green can be selected. 
This clearly ticks the boxes for what you said you want to be able to do. 

Help me understand what is wrong with kdenlive here, please. 
The version on kdenlive that I am using here is Applications 16.04 plus bugfixes.
Comment 5 Vincent PINON 2016-08-09 10:11:36 UTC
Thanks Evert for following.
Let me close the bug as it seems to work.
Larry please try on your side (16.04 or later version) and reopen if the solution fails.