Borrowing it
Nothing to install: this file belongs to ChanMeng666/echook-promo-video. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ChanMeng666/echook-promo-video/main/.agent/skills/remotion-best-practices/SKILL.mdgit clone --depth 1 https://github.com/ChanMeng666/echook-promo-videoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/chanmeng666/echook-promo-video/remotion-best-practices)<a href="https://agentmods.dev/skills/chanmeng666/echook-promo-video/remotion-best-practices"><img src="https://agentmods.dev/badge/skills/chanmeng666/echook-promo-video/remotion-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/chanmeng666/echook-promo-video/remotion-best-practices"><img src="https://agentmods.dev/badge/skills/chanmeng666/echook-promo-video/remotion-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00017 | $0.00999 |
| Opus 5.5 | $0.00007 | $0.00400 |
| Sonnet 5.5 | $0.00003 | $0.00200 |
| Haiku 4.5 | $0.00002 | $0.00100 |
Grade A, and why
remotion-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
84% identical to remotion-best-practices — 11 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.
When to use
Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.
Captions
When dealing with captions or subtitles, load the ./rules/subtitles.md file for more information.
Using FFmpeg
For some video operations, such as trimming videos or detecting silence, FFmpeg should be used. Load the ./rules/ffmpeg.md file for more information.
Audio visualization
When needing to visualize audio (spectrum bars, waveforms, bass-reactive effects), load the ./rules/audio-visualization.md file for more information.
How to use
Read individual rule files for detailed explanations and code examples:
- rules/3d.md - 3D content in Remotion using Three.js and React Three Fiber
- rules/animations.md - Fundamental animation skills for Remotion
- rules/assets.md - Importing images, videos, audio, and fonts into Remotion
- rules/audio.md - Using audio and sound in Remotion - importing, trimming, volume, speed, pitch
- rules/calculate-metadata.md - Dynamically set composition duration, dimensions, and props
- rules/can-decode.md - Check if a video can be decoded by the browser using Mediabunny
- rules/charts.md - Chart and data visualization patterns for Remotion (bar, pie, line, stock charts)
- rules/compositions.md - Defining compositions, stills, folders, default props and dynamic metadata
- rules/extract-frames.md - Extract frames from videos at specific timestamps using Mediabunny
- rules/fonts.md - Loading Google Fonts and local fonts in Remotion
- rules/get-audio-duration.md - Getting the duration of an audio file in seconds with Mediabunny
- rules/get-video-dimensions.md - Getting the width and height of a video file with Mediabunny
- rules/get-video-duration.md - Getting the duration of a video file in seconds with Mediabunny
- rules/gifs.md - Displaying GIFs synchronized with Remotion's timeline
- rules/images.md - Embedding images in Remotion using the Img component
- rules/light-leaks.md - Light leak overlay effects using @remotion/light-leaks
- rules/lottie.md - Embedding Lottie animations in Remotion
- rules/measuring-dom-nodes.md - Measuring DOM element dimensions in Remotion
- rules/measuring-text.md - Measuring text dimensions, fitting text to containers, and checking overflow
- rules/sequencing.md - Sequencing patterns for Remotion - delay, trim, limit duration of items
- rules/tailwind.md - Using TailwindCSS in Remotion
- rules/text-animations.md - Typography and text animation patterns for Remotion
- rules/timing.md - Interpolation curves in Remotion - linear, easing, spring animations
- rules/transitions.md - Scene transition patterns for Remotion
- rules/transparent-videos.md - Rendering out a video with transparency
- rules/trimming.md - Trimming patterns for Remotion - cut the beginning or end of animations
- rules/videos.md - Embedding videos in Remotion - trimming, volume, speed, looping, pitch
- rules/parameters.md - Make a video parametrizable by adding a Zod schema
- rules/maps.md - Add a map using Mapbox and animate it
- rules/voiceover.md - Adding AI-generated voiceover to Remotion compositions using ElevenLabs TTS
What ships with it
39 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- rules/3d.md 2.2 KB
- rules/animations.md 790 B
- rules/assets.md 1.6 KB
- rules/assets/charts-bar-chart.tsx 3.3 KB
- rules/assets/text-animations-typewriter.tsx 2.1 KB
- rules/assets/text-animations-word-highlight.tsx 2.3 KB
- rules/audio-visualization.md 4.8 KB
- rules/audio.md 3.5 KB
- rules/calculate-metadata.md 3.2 KB
- rules/can-decode.md 1.5 KB
- rules/charts.md 2.9 KB
- rules/compositions.md 3.6 KB
- rules/display-captions.md 5.3 KB
- rules/extract-frames.md 5.4 KB
- rules/ffmpeg.md 998 B
- rules/fonts.md 3.4 KB
- rules/get-audio-duration.md 1.3 KB
- rules/get-video-dimensions.md 1.6 KB
- rules/get-video-duration.md 1.3 KB
- rules/gifs.md 3.6 KB
- rules/images.md 2.7 KB
- rules/import-srt-captions.md 2.2 KB
- rules/light-leaks.md 2.3 KB
- rules/lottie.md 1.7 KB
- rules/maps.md 11 KB
- rules/measuring-dom-nodes.md 974 B
- rules/measuring-text.md 2.7 KB
- rules/parameters.md 2.3 KB
- rules/sequencing.md 2.7 KB
- rules/subtitles.md 922 B
- rules/tailwind.md 422 B
- rules/text-animations.md 700 B
- rules/timing.md 3.8 KB
- rules/transcribe-captions.md 1.9 KB
- rules/transitions.md 5.7 KB
- rules/transparent-videos.md 2.2 KB
- rules/trimming.md 1.2 KB
- rules/videos.md 3.4 KB
- rules/voiceover.md 3.3 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 58 lines · 17 tokens per session scan A af627225edda
remotion-best-practices is a skill published in the GitHub repository ChanMeng666/echook-promo-video (2 stars, last pushed 11d ago), licensed MIT. It adds 17 tokens to every session and 999 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 84% identical to remotion-best-practices, differing in 11 lines, and is treated as a copy.
Other skills, from other repositories
remotion
Toolkit-specific Remotion patterns — custom transitions, shared components, and project conventions. For core Remotion framework knowledge (hooks, animations, rendering, etc.), see the remotion-official skill.
elevenlabs
Generate AI voiceovers, sound effects, and music using ElevenLabs APIs. Use when creating audio content for videos, podcasts, or games. Triggers include generating voiceovers, narration, dialogue, sound effects from descriptions, background music, soundtrack generation, voice cloning, or any audio synthesis task.
acestep
AI music generation with ACE-Step 1.5 — background music, vocal tracks, covers, stem extraction, audio repainting, and continuation for video production. Use when generating music, soundtracks, jingles, or working with audio stems. Triggers include background music, soundtrack, jingle, music generation, stem…
ffmpeg
Video and audio processing with FFmpeg. Use for format conversion, resizing, compression, audio extraction, and preparing assets for Remotion. Triggers include converting GIF to MP4, resizing video, extracting audio, compressing files, or any media transformation task.
ltx2
AI video generation with LTX-2.3 22B — text-to-video, image-to-video clips for video production. Use when generating video clips, animating images, creating b-roll, animated backgrounds, or motion content. Triggers include video generation, animate image, b-roll, motion, video clip, text-to-video, image-to-video.
moviepy
Python video composition with moviepy 2.x — overlaying deterministic text on AI-generated video (LTX-2, SadTalker), compositing clips, single-file build.py video projects. Use when adding labels/captions/lower-thirds to LTX-2 or SadTalker outputs, building short ad-style spots in pure Python without Remotion, or doing…