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IDProjectCategoryView StatusLast Update
0000571Cinelerra-GG[All Projects] Featurepublic2021-06-02 07:50
Reporterpallium Assigned ToPhyllisSmith  
PrioritynormalSeverityminorReproducibilityhave not tried
Status acknowledgedResolutionopen 
Product Version 
Target VersionFixed in Version 
Summary0000571: Overlay : Alpha
DescriptionCan you add the plugin of frei0r : alphaatop. -> https://www.mltframework.org/plugins/TransitionFrei0r-alphaatop/
Keep the alpha of the track above and remplace the pixels of the track above with the track below. Maybe with an example, it's more clear (video and picure below).
TagsNo tags attached.

Activities

IgorBeg

IgorBeg

2021-06-02 07:50

reporter   ~0004776

@pallium
I am glad you have seen other things in my demo. This was my goal.
When I do a demo I try to add other things that an User might think useful.

@AndreaPaz
About the 3 my demo, I guess you would like to have their with subtitles or am I wrong?
Let's see. (I am getting lazy,... sorry)
pallium

pallium

2021-06-02 00:48

reporter   ~0004773

Hooo we need to do a "sandwich overlay". Very good!!! Thanks @IgorBeg. You also solved another of my problem: I didn't know to import a transition in black and white. Now it's possible with overlay and chromakey.

import-transition.png (835,831 bytes)
transition-overlay-chromakey.webm (752,198 bytes)
Andrea_Paz

Andrea_Paz

2021-06-01 20:37

manager   ~0004772

[@IgorBeg; OT]
Any chance you'd like to turn these 2 videos on alpha mode and the other on copying effects keyframes into video tutorials?
IgorBeg

IgorBeg

2021-06-01 18:34

reporter   ~0004771

@pallium
Cinelerra[--] can do that!

Like @Andrea_Paz said you can use Overlay Mode,... or Overlay plugin (this one is more "flexible").
Of course your "Color Model" in Settings-> Format...-> Video section have to be RGBA or YUVA (with Alpha Channel).

For Overlay plugin you can see my demo at: https://streamable.com/ddji2l
For Overlay Mode you can see my demo at: https://streamable.com/8dh84l
pallium

pallium

2021-05-31 15:27

reporter   ~0004770

@PhyllisSmith
I just suggest. I don't want to stress someone. Cinelerra is a great surprise and I just want to help the project with my experience in video editing.

@Andrea_Paz
I tried all the overlays of Cinelerra 3 times and I don't get a similar result.
Andrea_Paz

Andrea_Paz

2021-05-31 14:59

manager   ~0004769

I don't know much about Overlays. Probably what you are looking for is "Dsatop" or its opposite "Srcatop", which are among the Porter-Duff Overlays. see:
https://cinelerra-gg.org/download/CinelerraGG_Manual/Overlays.html
PhyllisSmith

PhyllisSmith

2021-05-31 14:07

manager   ~0004768

@pallium
That would be a good addition. It is not as easy as just "adding it". A whole new plugin program has to be
written in C++ code to create the desired effect.
@Andrea_Paz
Is there another plugin already that would get similar results?
pallium

pallium

2021-05-31 11:40

reporter  

overlay-alpha.webm (190,805 bytes)
kdenlive-alphaatop.png (26,124 bytes)
kdenlive-alphaatop.png (26,124 bytes)

Issue History

Date Modified Username Field Change
2021-05-31 11:40 pallium New Issue
2021-05-31 11:40 pallium File Added: overlay-alpha.webm
2021-05-31 11:40 pallium File Added: kdenlive-alphaatop.png
2021-05-31 14:07 PhyllisSmith Assigned To => PhyllisSmith
2021-05-31 14:07 PhyllisSmith Status new => acknowledged
2021-05-31 14:07 PhyllisSmith Note Added: 0004768
2021-05-31 14:59 Andrea_Paz Note Added: 0004769
2021-05-31 15:27 pallium Note Added: 0004770
2021-06-01 18:34 IgorBeg Note Added: 0004771
2021-06-01 20:37 Andrea_Paz Note Added: 0004772
2021-06-02 00:48 pallium File Added: import-transition.png
2021-06-02 00:48 pallium File Added: transition-overlay-chromakey.webm
2021-06-02 00:48 pallium Note Added: 0004773
2021-06-02 07:50 IgorBeg Note Added: 0004776