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mix a music track under a silent video using ffmpeg. normalizes loudness to roughly -14 LUFS, applies a short fade in and out, and trims or loops the music to match video duration. use after a silent video master and a chosen music file are both ready.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
Produce a Photo-Grid promo card — a silent, music-optional feed-placement video where a scrolling 2×N tile grid (product photos + short brand video clips + big-type offer tiles + a promo-code tile) animates under a centered wordmark, headline, sub, and outline feature chips. 9:16 or 4:5, ~10s, $0 HTML-hyperframe pipeline (no T2V, no VO). Recreates the Meta "photo-grid mosaic" template (e.g. "Our New Band 2.0 / LAUNCH30"). Validated on Hume Health (Father's Day promo, 2026-06-03). Use when the brand wants a clean editorial feed card that works muted; NOT for kinetic-BG vignette (use create-vignette-ad), UGC, or VO-driven ads.
Remix a published Apple Notes video ad from the Goose Ads library for a new brand — keep the source's note structure and typing pacing, swap in the brand's product, voice, and promo code, get the note approved in-session, then render with create-apple-notes-video-ad and publish the MP4 back to Gooseworks with live stage reporting. The Apple Notes typing-reveal counterpart to remix-imessage-ad-from-sample; this is what the app's Apple Notes format tab calls.
Remix a published ChatGPT video ad from the Goose Ads library for a new brand — keep the source's conversation structure and pacing (the single ask → streamed answer beat), swap in the brand's product as the natural recommendation and the promo code woven into the response, get the conversation approved in-session, then render with create-chatgpt-video-ad and publish the MP4 back to Gooseworks with live stage reporting. The ChatGPT chat-reveal / ask-ChatGPT counterpart to remix-imessage-ad-from-sample; this is what the app's ChatGPT format tab calls.
Remix a published iMessage video ad from the Goose Ads library for a new brand — keep the source's conversation structure and pacing, swap in the brand's product, voice, and promo code, get the thread approved in-session, then render with create-imessage-video-ad and publish the MP4 back to Gooseworks with live stage reporting. The video counterpart to remix-graphic-ad-from-reference; this is what the app's iMessage format tab calls.
Remix a published Photo-Grid promo card from the Goose Ads library for a new brand — keep the source's grid layout, tile rhythm, scroll, and offer structure, swap in the brand's product photos, corpus video clips, wordmark, palette, copy, and promo code, get the card approved in-session, then render with create-photo-grid-ad and publish the MP4 back to Gooseworks with live stage reporting. The photo-grid counterpart to remix-imessage-ad-from-sample; this is what the app's Photo-Grid format tab calls.
Burn 2–3-word, beat-synced lyric captions into a music-video ad. Reads word-level timestamps (ElevenLabs music metadata or Whisper transcript of the rendered song), chunks lyrics into 1–3 word bursts, emphasizes operator-tagged accent words, and produces an ASS overlay plus a timeline preview strip.
| name | add-music-track |
| description | mix a music track under a silent video using ffmpeg. normalizes loudness to roughly -14 LUFS, applies a short fade in and out, and trims or loops the music to match video duration. use after a silent video master and a chosen music file are both ready. |
Take a silent (or near-silent) video master and a music file, mix them with sane defaults, and write a final video with audible, well-balanced music. Loudness is normalized so the output sits at roughly -14 LUFS (platform-friendly for social and YouTube). Fades in and out are applied automatically, and music duration is matched to video duration by trimming or looping with a crossfade.
--video <path> to a silent video (any common container).--music <path> to a music file (mp3 or wav). Must be a real music track from find-music, create-programmatic-music-bed, or user-supplied with a documented source. Synthesized tones (ffmpeg -f lavfi -i sine=..., white noise, oscillator output) are rejected by default.--out <path> for the mixed output.--target-lufs <float> (default -14).--fade-in <seconds> and --fade-out <seconds> (defaults: 0.5 and 1.0).--duck-vo <path> to a voiceover track to mix on top with side-chain ducking.--allow-placeholder-tone flag (off by default) for explicit smoke-test runs where the upstream user has acknowledged the music is a placeholder.ffprobe. Reject if the metadata or filename suggests a tone (lavfi, sine, tone, placeholder, synth), or if a spectral check shows a sustained pure-tone profile. Reject also if the run's caller manifest records music_source: placeholder. The run is blocked unless --allow-placeholder-tone is set.ffprobe and music duration.--duck-vo is provided, mix the VO at -16 LUFS and side-chain compress the music when VO is active.manifest.json with input paths, durations, target LUFS, music provenance (real | placeholder-tone-allowed), and the final output path. Write verification.md.manifest.json and verification.md.placeholder for production runs.blocked and direct the caller to re-run find-music. Do not silently mix a tone under a delivery video.