Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub · Developer Tools
Skill Video Caption Overlay
Render TikTok-style animated pill captions onto short-form videos using MoviePy + PIL. Takes a base MP4, a captions JSON, and optional background audio — out...
skill openclawclawhub Free
Render TikTok-style animated pill captions onto short-form videos using MoviePy + PIL. Takes a base MP4, a captions JSON, and optional background audio — out...
⬇ 0 downloads ★ 0 stars Unverified but indexed
Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md, scripts/example_captions.json, scripts/overlay.py
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
- Publisher
- Zero2Ai-hub
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
Video Caption Overlay
Animated pill-style caption overlays for short-form video. No Premiere, no CapCut — pure Python.
Usage
uv run --with moviepy --with pillow scripts/overlay.py \ --video base.mp4 \ --output final.mp4 \ --captions scripts/example_captions.json \ --audio music.mp3 \ --audio-start 8 \ --audio-vol 0.5 No --audio if you want to keep the original video audio.
Custom fonts
--font-black /path/to/Montserrat-Black.ttf \ --font-bold /path/to/Montserrat-Bold.ttf Falls back to Montserrat from ~/.local/share/fonts/ if not specified.
captions.json format
Array of phases — each phase is a time window with one or more pill lines stacked vertically. [ { "start": 0, "end": 3.2, "y_frac": 0.06, "lines": [ { "text": "POV:", "size": 28, "bold": true, "bg": [0, 195, 255], "fg": [0, 0, 0], "bg_opacity": 0.9, "px": 20, "py": 9, "r": 12 }, { "text": "drink more water", "size": 50, "bg": [255, 255, 255], "fg": [0, 0, 0] } ] } ] FieldTypeDefaultDescriptionstartfloatrequiredPhase start time (seconds)endfloatrequiredPhase end time (seconds)y_fracfloat0.06Vertical position as fraction of video heightlines[].textstringrequiredCaption textlines[].sizeint50Font size (px)lines[].boldboolfalseUse bold font (vs black/heavy)lines[].bg[R,G,B][255,255,255]Pill background colorlines[].fg[R,G,B][0,0,0]Text colorlines[].bg_opacityfloat0.93Pill background opacity (0–1)lines[].pxint26Horizontal paddinglines[].pyint13Vertical paddinglines[].rint18Border radius
PIL textbbox fix
PIL's textbbox((0,0), text, font) returns (x0, y0, x1, y1) where y0 is a non-zero offset (typically 7–15px depending on font size). Drawing text at (x, y) without compensating for this offset causes text to appear below the pill's visual center. Fix implemented in pill(): bb = draw.textbbox((0, 0), text, font=font) x_off, y_off = bb[0], bb[1] vis_w = bb[2] - bb[0] # actual visual width vis_h = bb[3] - bb[1] # actual visual height # Compensate offsets when drawing text tx = cx - vis_w // 2 - x_off ty = y - y_off draw.text((tx, ty), text, font=font, fill=fg)
Emoji note
NotoColorEmoji.ttf fails with PIL at arbitrary sizes (bitmap font with limited supported sizes). Use text alternatives ("Free delivery" instead of "Free delivery 🚚") for reliable rendering.
Example output
See scripts/example_captions.json for the full 3-phase TikTok ad structure: Phase 1 (0–3.2s): Hook — top-screen pill stack Phase 2 (2.8–5.8s): Product claim — overlapping fade Phase 3 (5.3–8.0s): CTA — bottom-screen price + delivery + bio link
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
Largest current source with strong distribution and engagement signals.
Package contents
Included in package
1 Docs1 Scripts1 Config
- SKILL.md
- scripts/overlay.py
- scripts/example_captions.json