video-still-animator

name	video-still-animator
description	Turn a single still image (PNG/JPG) into a short MP4 with a slow Ken-Burns zoom and a silent audio track. Pure ffmpeg wrapper. Designed as the on_failure substitute for AI video-gen steps that get blocked by content moderation: when seedance refuses, this skill emits a valid replacement clip from the already-generated still so a downstream merge can still produce a complete deliverable.
description_zh	将单张静态图片（PNG/JPG）转为带缓慢Ken-Burns缩放和静音音轨的短MP4。纯ffmpeg封装。设计为AI视频生成步骤因内容审核受阻时的on_failure替代：当seedance拒绝时，本技能从已生成的静图产出有效的替代片段，使下游合并仍能产出完整交付物。
provenance	{"origin":"opensquilla-original","license":"Apache-2.0"}
metadata	{"opensquilla":{"risk":"medium","capabilities":["filesystem-write","process-control"],"requires":{"bins":"[Truncated]","anyBins":"[Truncated]"}}}
entrypoint	{"command":"python {baseDir}/scripts/animate.py","args":["--input","{{ with.input_image }}","--output","{{ with.output_path }}","--duration","{{ with.duration | default(5) }}","--width","{{ with.width | default(720) }}","--height","{{ with.height | default(1280) }}","--fps","{{ with.fps | default(24) }}","--zoom-rate","{{ with.zoom_rate | default(0.0015) }}"],"parse":"text","timeout":120}

video-still-animator — Ken-Burns fallback clip from a still

Produces a short MP4 from a single PNG/JPG using ffmpeg's zoompan filter, so a downstream merge step still has a clip for every shot when an upstream AI video generation step gets blocked.

Why this skill exists

seedance-2-prompt (and any platform-moderated video model) can refuse individual requests for reasons that have nothing to do with the prompt's narrative quality:

• input photo contains a recognisable real person face
• output audio gets flagged by the safety classifier
• the moderation model's similarity threshold drifts day to day

In meta-short-drama we always have a fresh PNG on disk before the seedance call runs, so the cheapest "the show must go on" fallback is to turn that PNG into a Ken-Burns clip and feed it to the merger. The clip won't have the camera motion the prompt asked for, but the character, framing, and timing will still match the script.

Inputs (with:)

key	required	default	notes
input_image	yes	—	PNG or JPG path.
output_path	yes	—	Output .mp4 path. Parent dir created if missing.
duration	no	5	Clip length in seconds.
width	no	720	Output width. Match the merge step's pipeline.
height	no	1280	Output height. 720x1280 = 9:16.
fps	no	24	Output frame rate.
zoom_rate	no	0.0015	Per-frame zoom delta; 0.0015 over 5s ≈ 1.18× final zoom.

Output specs

• H.264 video at the requested resolution + fps
• AAC silent audio track (so merge steps that demux/remux audio do not trip on a missing stream)
• +faststart MP4 (web playback friendly)