yniantongtian-oss/ai-video-creation-collection/auto-editor-effects

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Apply actions and animations to sections of a video/audio with auto-editor — change speed, duck or fade volume, de-ess, zoom/Ken Burns, rotate/spin, draw boxes, overlay logos or picture-in-picture, and animate any of these with ramps and easing. Use when someone wants creative effects or per-section behavior rather than plain silence-cutting.

Install

npx vskill@latest install yniantongtian-oss/ai-video-creation-collection/auto-editor-effects

SKILL.md

Actions & animations

Instead of just cutting, give each section an action with --when-active (-w:1, loud) and --when-inactive (-w:0, silent). Defaults: -w:1 nil (keep), -w:0 cut. Chain actions with commas; they apply in order.

bash
auto-editor video.mp4 -w:0 speed:8            # fast-forward through silence (pitch preserved)
auto-editor video.mp4 -w:0 speed:3,volume:0.5 # speed up AND halve volume of silent parts

-w:0/-w:1 are the silent (label 0) and active (label 1) classes. You can define more classes with --edit:N/-e:N and act on them with --when:N/-w:N (N = 2–255) — see the auto-editor skill's "Labels" section. Every action below works as the value of any -w:N.

Actions

ActionWhat it doesForm / range
nilkeep unchanged—
cutremove section—
speedtime-stretch, pitch preservedspeed:8, speed:0.5
varispeedspeed via pitch shift (tape/vinyl)varispeed:2 (0.2–100)
volumescale volume (1=normal, 0.5=−6dB)volume:0.2
deesserreduce sibilancedeesser:intensity[:max[:freq]] (each 0–1)
invertinvert pixels—
zoomzoom factor (1=none)zoom:2, zoom:0.5 (>0–100)
rotatefixed clockwise rotation, expands so nothing clipsrotate:90 (pair with --resolution)
spincontinuous spin deg/rate (deg per sec)spin:0/120, spin:90/-45
drawboxfilled rectangledrawbox:x:y:w:h:color
posplace an overlay clip x:y[:scale]mainly used inside add / v3
addoverlay an image/video layeradd:path[:x:y:scale]
bash
auto-editor video.mp4 -w:1 deesser:0.8:0.7:0.4
auto-editor video.mp4 -w:1 rotate:90 --resolution 1080,1920   # landscape → portrait
auto-editor video.mp4 -w:1 drawbox:0:0:1920:200:#000000       # redact a strip
Overlays — add

add is virtual: it adds an overlay layer rather than a per-frame effect. Still images hold for the whole section; PNG alpha is preserved. Omit placement to scale-to-fit and center. Actions chained after an add apply to that new overlay, not the base.

bash
auto-editor video.mp4 -w:1 add:./logo.png             # centered, fit to canvas
auto-editor video.mp4 -w:1 add:./pip.mp4:900:60:0.25  # quarter-size PiP in the corner
auto-editor video.mp4 -w:1 add:./logo.png,spin:0/-30  # the logo spins, not the base video
auto-editor song.mp3 -bg white -w:1 add:./cover.png   # audio + image → video

Overlays appear only where their section is kept, so for silent sections use -w:0 nil,add:... (keep + overlay). With --set-action the range is kept automatically.

Animations — ramps from..to

zoom, opacity, blur, brightness, volume, and each pos field accept a ramp. The value interpolates across the section, reaching to on its last frame. More than two points = keyframes, spread evenly.

bash
auto-editor video.mp4 -w:1 zoom:1..1.5          # Ken Burns
auto-editor video.mp4 -w:1 opacity:0..1         # fade in
auto-editor video.mp4 -w:1 volume:0..1          # audio fade in
auto-editor video.mp4 -w:1 zoom:1..1.5..1       # zoom in then out (keyframes)
auto-editor video.mp4 -w:1 add:./logo.png,pos:0..1200:40:1..0.5  # slide + shrink overlay

Easing — :ease=curve[:duration], curve ∈ linear|in|out|inout. A standalone ease: token sets the curve for every animated action after it. rotate/spin are not affected by easing.

bash
auto-editor video.mp4 -w:1 zoom:1..1.5:ease=inout
auto-editor video.mp4 -w:1 opacity:0..1:ease=in:2sec        # ease over 2s, then hold
auto-editor video.mp4 -w:1 ease:out,zoom:1..1.3,brightness:0..0.3

Target a time range — --set-action

--set-action ACTION,START,END overrides defaults for a range (range syntax; sec, start/end, negatives all work). The range is force-kept.

bash
auto-editor video.mp4 --set-action nil,0,5sec
auto-editor video.mp4 --set-action speed:1.5,varispeed:1.5,30sec,end
auto-editor video.mp4 --set-action add:./logo.png:600:300:1.0,1sec,2sec

Recipes

bash
auto-editor :mic -w:1 deesser:0.8:0.7:0.4         # record, then clean up speech
auto-editor podcast.mp3 -w:0 cut -w:1 speed:1.15      # cut silence, tighten speech
auto-editor video.mp4 -w:0 volume:0.3                 # duck (not cut) the silence
auto-editor video.mp4 -w:1 varispeed:1.25             # nightcore (speed + pitch up)
auto-editor video.mp4 -w:0 speed:6,volume:0.4         # fast, quiet silent sections

With :mic, press Ctrl-C to finish capture; actions are applied afterward.

Full reference: <https://auto-editor.com/ref/actions.md>. For plain cutting / pace / edit methods, see the auto-editor skill.

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