Stitch Videos Ffmpeg
stitch video segments with ffmpeg concat, xfade, overlay, audio mux, and export settings.
by Athina AInpx gooseworks install --all # then, in Claude Code, Cursor, or Codex: /gooseworks use the stitch-videos-ffmpeg skill
stitch-videos-ffmpeg
Purpose
Stitch video segments with ffmpeg concat, xfade, overlay, audio mux, and export settings.
Implementation status: refactored from existing repository skills. The workflow consolidates behavior that previously lived across larger skills.
Sources: ad-studio, voiceover-product-ad, ugc-product-video, voiceless-music-transformation-reel, product-stopmotion-ad.
Extraction notes: assembly and composite scripts.
Inputs
- A clear user brief or source asset path.
- Brand, product, audience, platform, and approval constraints when relevant.
- Required credentials or provider access for any external service used by this skill.
- Output directory or test-run directory where artifacts should be saved.
Workflow
- Read the brief and confirm all required inputs are present.
- Load any referenced files in this skill folder only when they are needed.
- Run the provider, script, or planning workflow described by this skill.
- Save outputs under the requested output folder or
skills/test-runs/<timestamp>/<skill-name>/during tests. - Write or update a
manifest.jsonfor executable runs with status, provider, outputs, warnings, and errors.
Output
- Primary artifact or written plan requested by the skill.
manifest.jsonfor executable runs.verification.mdor a short verification summary that names the checks performed.- Any generated source assets, intermediate files, or final exports in the run folder.
Quality Checks
- Required files exist and paths in the manifest are valid.
- Output matches the requested format, platform, duration, dimensions, or text structure.
- Brand claims, captions, on-screen text, and CTAs follow the provided brand rules.
- Provider failures, skipped integrations, and human-review needs are explicit.
Failure Modes
- Missing credentials, provider access, or source files.
- Output does not match requested dimensions, duration, structure, or brand constraints.
- Generated media contains artifacts, unreadable text, unsafe claims, or caption collisions.
- Scaffolded skills cannot run production workflows until implementation details are added.
What's included
Video Production Harness
Full video production sequence with script review, actual ingredient choices, controlled generation, editing, evidence-based quality review, polish, captions and delivery. A host binding supplies project storage, authentic approvals, provider access and billing.
Render Street Interview
Build a vox-pop street interview video ad. An interviewer with a handheld mic asks passers-by one question about the brand's product, they give blunt wrong guesses, one gives the real answer, and the cut lands on a branded end card. Generates the takes through the GooseWorks fal proxy (Seedance 2.0 with native voice), then grades, re-cuts, captions and gates them locally. Use for the street-interview format.
Write Video Ad Script
Write the words of a short-form video ad (voiceover, dialogue, chat bubbles, on-screen lines) the way performance creative teams do instead of from a blank page. Builds the script from the buyers' own words, the beat sheet of an ad that already works and three deliberately different angles, filters them with a rule check and a second non-Claude model, and takes the strongest into the review with the other two as one-line swaps. Use it in every video ad run before any paid step, and whenever the user asks to write, rewrite or improve a video ad script or says a script sounds generic or AI-written.