MCPInstall

homepage-video-assets

by remotion-devMedia & Creative

Use when rendering or replacing Remotion homepage creator strip videos, especially transparent Chrome WebM and Safari MP4 assets copied into both promo-pages and docs.

Installs
484
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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/remotion-dev/remotion --skill homepage-video-assets
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads homepage-video-assets automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Homepage Video Assets

Use this workflow for homepage creator strip assets such as:

  • homepage-assets-master
  • editing-vp9-chrome / editing-safari
  • what-is-remotion

Workflow

  1. Render a fresh transparent ProRes 4444 master from packages/brand.
cd packages/brand
bunx remotion render <composition-id> /tmp/<asset>-master.mov \
  --codec=prores \
  --prores-profile=4444 \
  --pixel-format=yuva444p10le \
  --image-format=png \
  --timeout=120000 \
  --overwrite
  1. Convert from the ProRes master, not from a previous WebM/MOV.

Chrome WebM:

ffmpeg -y -i /tmp/<asset>-master.mov \
  -vf scale=540:540 \
  -c:v libvpx \
  -pix_fmt yuva420p \
  -auto-alt-ref 0 \
  -an /tmp/<chrome-name>.webm

Safari MP4:

ffmpeg -y -i /tmp/<asset>-master.mov \
  -vf scale=540:540 \
  -c:v prores_ks \
  -profile:v 4 \
  -pix_fmt yuva444p10le \
  -an /tmp/<asset>-540-prores.mov

avconvert \
  --source /tmp/<asset>-540-prores.mov \
  --preset PresetHEVCHighestQualityWithAlpha \
  --output /tmp/<safari-name>.mp4 \
  --replace
  1. Copy both outputs into both app folders:
cp /tmp/<chrome-name>.webm ../promo-pages/public/img/<chrome-name>.webm
cp /tmp/<safari-name>.mp4 ../promo-pages/public/img/<safari-name>.mp4
cp /tmp/<chrome-name>.webm ../docs/static/img/<chrome-name>.webm
cp /tmp/<safari-name>.mp4 ../docs/static/img/<safari-name>.mp4

Verification

Verify the ProRes master has real alpha before converting, and verify the Safari MP4 exists in both folders:

ffmpeg -i /tmp/<asset>-master.mov
ffmpeg -i ../promo-pages/public/img/<safari-name>.mp4
ffmpeg -y -i /tmp/<asset>-master.mov \
  -vf alphaextract -frames:v 1 /tmp/<asset>-alpha.png

The master should report prores (4444) and a yuva... pixel format. alphaextract should succeed, and the alpha image should not be fully opaque. A common failure mode is alphaextract succeeding but every sampled pixel is opaque; in that case, the master was rendered with a black/opaque background or a stale opaque master was reused.

Verify every copied Chrome WebM and Safari MP4 is exactly 540x540:

for f in \
  ../promo-pages/public/img/<chrome-name>.webm \
  ../promo-pages/public/img/<safari-name>.mp4 \
  ../docs/static/img/<chrome-name>.webm \
  ../docs/static/img/<safari-name>.mp4; do
  ffmpeg -i "$f"
done

The Safari MP4 should look like the known-good file shape: major_brand: mp42, compatible_brands: isommp41mp42, Video: hevc (Main) (hvc1), 540x540, and handler_name: Core Media Video. If it reports h264 (avc1) or dimensions such as 960x540, it is the wrong file and will render differently in Safari.

Do not add ProRes .mov files to the homepage PR; they are too large. Safari should use the small .mp4 fallback. Chrome should use the transparent .webm.

FAQ

What does the homepage-video-assets skill do?

Use when rendering or replacing Remotion homepage creator strip videos, especially transparent Chrome WebM and Safari MP4 assets copied into both promo-pages and docs.

How do I install homepage-video-assets?

Run npx skills add https://github.com/remotion-dev/remotion --skill homepage-video-assets in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/homepage-video-assets/ (personal) or .claude/skills/homepage-video-assets/ (project).

Which AI agents can use homepage-video-assets?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is homepage-video-assets safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains homepage-video-assets?

It is published by remotion-dev in remotion-dev/remotion. It has 484 recorded installs.

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