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Get Started Free →gooseworks-ai/render-cosmic-mythology-voiceover
Assemble a cosmic-mythology-voiceover reel from a config — a warm spoken voiceover carries the whole narrative while N curated cosmic stills are weighted beat-synced across the delivered VO duration (cut_dur = VO_dur times weight over the weight sum, so emotional beats hold longer), Ken-Burns-zoomed per still (scale 2x, center crop, zoompan, fade-in first and fade-out last), ffmpeg-concatenated, the VO composited under the picture (libx264 crf18 plus aac), the ONE on-screen hook line faded on ov
Passed 18 of 21 test cases with the skill, and 7 of 21 without it.
and 13 more in the full report
12 fixed7 passed either way3 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
One of 12 test cases the skill fixed. Same model, same prompt, with and without the skill.
When preparing image stills for the subtle pan-zoom motion effect, what scaling factor and crop should be applied to the source images?
| Checked | Without skill | With skill |
|---|---|---|
| Scales source images by 2x with center cropping prior to applying zoompan | Missed | Passed |
The instructions your model reads when the skill loads.
Assemble a cosmic-mythology-voiceover reel from a config: a faceless, cinematic storytelling video where one spoken voiceover carries the whole narrative over a slow, weighted Ken-Burns zoom across curated stills in ONE locked look, with ONE on-screen hook line and burned captions. The narrator, voice, tone, story shape, visual world and art style are the recipe's user choices — this capability only assembles what it is given (the demo: a warm contemplative "myth as teacher" reframe over deep-indigo + gold cosmic stills). This capability is the FREE, deterministic assembly — the weighted beat-sync sequencing, the Ken-Burns render, the concat, the VO composite, the hook overlay, and the caption burn.
scripts/config.example.json is the worked example — reference only, never the default
(WishAstro "Saturn isn't your villain", ~31s
1080×1920 9:16, 12 weighted Ken-Burns cuts); scripts/PIPELINE.md maps every config block to its
source step and scripts/README.md documents the free assembly.
There is a single runnable script — scripts/render.py (config-driven, ffmpeg + Pillow only, NO
API keys and NO drawtext/libass required):
python3 scripts/render.py --config config.json --vo working/vo2/vo_atempo.mp3 \
--stills-dir working/stills --out working/final.mp4 \
[--words working/vo2/words.json] [--endcard working/endcard.png]
This is the FREE, deterministic assembly stage — it spends nothing. The paid inputs are
separate capabilities — the spoken VO (create-vo-elevenlabs, ElevenLabs eleven_v3 from a
tone-tagged script, atempo time-stretched so the delivered duration sets the timeline) and the 4–6
hero stills in one look pack (create-image-fal, Flux Pro 1.1, reused as repeats to reach the
~10–12 cuts). Given the VO + the stills + the per-cut weight array + the hook line, render.py
distributes the cuts across the VO duration by the weighted formula, Ken-Burns-renders each still,
concats, composites the VO, fades the hook line on over the open, burns the captions, and (if
--endcard is passed) appends a brand end card → the master + a poster. Re-cuts reuse the existing
VO / stills and cost $0. See scripts/README.md §0 for the full arg contract.
test cases passed, vs 7 / 21 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.