Remotion 官方免费在 GitHub 公开

homepage-video-assets

Prepare Remotion homepage videos from a transparent ProRes master. Create Chrome WebM and Safari MP4 versions, verify transparency and 540-by-540 dimensions, and copy the finished assets into both the promotional site and documentation folders.

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原文查看原文说明

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.

remotion-dev/remotion

查看安装方法

适用场景

Replacing videos in the homepage creator strip
Creating transparent WebM videos for Chrome
Creating MP4 fallback videos for Safari
Checking transparency, dimensions, and asset placement

包含的文件（1）

SKILL.md3.0 KB

SKILL.md（原文）

安装前可以查看交给 AI 代理的指令内容。

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

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

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

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.

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同一仓库的技能

add-bug

Remotion 官方免费

Add a reported Remotion bug to the bugs API with its affected versions, a short title, and upgrade guidance. Follow the existing entry format and place the new record first so recent bugs appear at the top.

中文简介正在准备中。当前显示英语简介。

Adding a reported bug to the Remotion bugs API
Recording which versions a bug affects
Including upgrade guidance in a bug description