auto-editor-effects
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.
- Installs
- 660
- Last 24h
- +21
- Trending rank
- #5699
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/wyattblue/auto-editor --skill auto-editor-effects- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads auto-editor-effects automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
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.
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
| Action | What it does | Form / range |
|---|---|---|
nil | keep unchanged | — |
cut | remove section | — |
speed | time-stretch, pitch preserved | speed:8, speed:0.5 |
varispeed | speed via pitch shift (tape/vinyl) | varispeed:2 (0.2–100) |
pitch | shift pitch only, duration preserved | pitch:12 (octave up), pitch:-7 (−24–24 semitones) |
volume | scale volume (1=normal, 0.5=−6dB) | volume:0.2 |
deesser | reduce sibilance | deesser:intensity[:max[:freq]] (each 0–1) |
tone | wave from a MIDI note (add: generator) | add:tone:69, add:tone:36:saw |
invert | invert pixels | — |
zoom | zoom factor (1=none) | zoom:2, zoom:0.5 (>0–100) |
rotate | fixed clockwise rotation, expands so nothing clips | rotate:90 (pair with --resolution) |
spin | continuous spin deg/rate (deg per sec) | spin:0/120, spin:90/-45 |
drawbox | filled rectangle | drawbox:x:y:w:h:color |
pos | place an overlay clip x:y[:scale] | mainly used inside add / v3 |
add | overlay a layer: every stream the file holds | add:path[:x:y:scale] |
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. add brings every stream the file holds: a video with
sound gets a video layer plus its audio layers (mixed in, not a second stream),
an audio-only file adds sound with no picture, an image adds picture with no
sound. In place of a file it takes a generator action: confetti/drawbox
paint a video layer, tone synthesizes an audio one (so add:tone layers stack
into a chord).
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 # PiP in the corner, audio included
auto-editor video.mp4 -w:1 add:./pip.mp4:900:60:0.25,volume:0.3 # ...tucked under the base
auto-editor video.mp4 -w:1 add:./music.mp3,volume:0.4 # background music, no picture added
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
auto-editor video.mp4 -w:1 add:tone:69 # 440 Hz tone over the audio
auto-editor video.mp4 -w:0 nil,add:tone:81 # beep the silence, don't cut it
auto-editor video.mp4 -w:1 add:tone:60,volume:1..0:ease=out # a plucked, decaying note
auto-editor video.mp4 -w:1 add:tone:36:saw # buzzy bass (sine|saw|square|triangle)
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 and pixelate
field accept a ramp. The value interpolates across the section, reaching to on
its last frame. More than two points = keyframes, spread evenly.
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 pixelate:1..64 # dissolve into coarser blocks
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.
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
Timed keyframes — value@time puts a keyframe at a time from the section's
start: a bare frame count, sec, or % of the section. The value holds before
the first and after the last; an untimed keyframe among timed ones sits evenly
between its neighbors. An ease curve then eases each step between keyframes
(no ease duration with timed keyframes).
auto-editor video.mp4 -w:1 zoom:1@0..2@1.5sec..1@100% # in by 1.5s, out by the end
auto-editor video.mp4 -w:1 volume:0@0..0@2sec..1@4sec # silent 2s, then fade in
auto-editor video.mp4 -w:1 opacity:1@80%..0:ease=in # fade out over the last 20%
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.
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
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 pitch:12 # chipmunk the silence, same length
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.
FAQ
What does the auto-editor-effects skill do?
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.
How do I install auto-editor-effects?
Run npx skills add https://github.com/wyattblue/auto-editor --skill auto-editor-effects in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/auto-editor-effects/ (personal) or .claude/skills/auto-editor-effects/ (project).
Which AI agents can use auto-editor-effects?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is auto-editor-effects safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains auto-editor-effects?
It is published by wyattblue in wyattblue/auto-editor. It has 660 recorded installs.
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