https://bugs.kde.org/show_bug.cgi?id=524817
Bug ID: 524817
Summary: Feature Request: "Semi-Discrete" (Hold & Ease)
Keyframe Interpolation Type
Classification: Applications
Product: kdenlive
Version First unspecified
Reported In:
Platform: Other
OS: All
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: Video Effects & Transitions
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
I would like to propose a new keyframe interpolation mode alongside Linear,
Discrete, and Smooth: Semi-Discrete.
Instead of moving across the entire interval, a Semi-Discrete keyframe would
hold its initial value statically for most of the duration and only smoothly
ease into the target value right before the next keyframe (e.g., during the
last 1–2 seconds or a set transition window), without requiring extra
intermediate keyframes.
Use Case: Explainer & Educational Videos (List Item Highlighting) In
educational content, presentations, and tutorials, editors frequently highlight
items sequentially:
An overlay, box, or highlight needs to remain completely static while a topic
is explained (often for 10–30 seconds).
Right at the end of the explanation, it needs a smooth transition (position,
scale, or opacity) to highlight the next point on the list.
Why this is needed:
Eliminates redundant keyframes: Currently, achieving this requires creating a
duplicate "holding" keyframe just before the transition on every single
element.
Faster pacing adjustments: When moving or trimming clips to match voiceover
timing, moving a single keyframe is fast; having to constantly calculate and
move pairs of duplicate keyframes clutters the interface and slows down the
editing workflow.
Proposed Implementation: Add a "Semi-Discrete" interpolation option to the
keyframe menu that automatically holds the value and applies an ease-in
transition only at the tail end of the interval.
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