https://bugs.kde.org/show_bug.cgi?id=478315
Bug ID: 478315
Summary: Keyframe interpolation modes, In and Out concepts
wrong.
Classification: Applications
Product: kdenlive
Version: git-master
Platform: Other
OS: Other
Status: REPORTED
Severity: normal
Priority: NOR
Component: Effects & Transitions
Assignee: j...@kdenlive.org
Reporter: gabcor...@gmail.com
Target Milestone: ---
Created attachment 164047
--> https://bugs.kde.org/attachment.cgi?id=164047&action=edit
Adobe After Effects Manual
SUMMARY
***
When setting keyframe interpolation, the concept of what is considered "In" and
what "Out" is wrong, in the current implementation.
In: is when the time is "coming in" to the selected keyframe.
Out: is when time is "going out" of the selected keyframe.
***
ADDITIONAL INFORMATION
There are a lot of references to this, but the main ones should probably be
Adobe products (After Effects / Premiere Pro) and OpenToonz, all of the using
the concept in the right way.
A lot of classic animation related textbooks where the concept is explained
clearly: Animator's Survival Kit, etc.
Here you can see a demo of After Effects Easing In/Out into play:
https://www.youtube.com/watch?v=UVox_2py9yU
Below I will attach excerpts from the After Effects manual and from Animator's
Survival Kit by Richard Williams, explaining the concept.
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