Agent skill · remotion-dev
update-ffmpeg
Update the monorepo FFmpeg archives, regenerate bindings, rebuild compositor binaries, and validate a single Remotion pull request. Use after the seven-platform FFmpeg build completes.
What it needs
About 1k tokens when loaded.
What this skill does
Update Remotion FFmpeg The FFmpeg build recipes, Rust bindings and wrapper live in packages/compositor/ffmpeg. The compositor and wrapper use local Cargo dependencies, and updates are reviewed in a single Remotion pull request. Collect and import Use the full source commit SHA for the intended FFmpeg build. Explicitly trigger the CircleCI pipeline on the branch containing that commit using the web app's Trigger Pipeline button or the API. No parameters are needed: the workflow only runs for pipeline.trigger.type == "api", which covers both methods. See the trigger instructions. Wait for its five jobs and the macOS GitHub Actions build for the same commit to succeed. Then collect artifacts from the Remotion repository root: The collector requires successful GitHub Actions and CircleCI builds for that same SHA. Do not combine runs or fill missing targets from an older build. Keep the returned MANIFEST.json and SHA256SUMS with the seven archives. Upload the verified archives to a new immutable directory on remotion.media using the repository's R2 upload workflow. Never overwrite an existing release directory. Then run: The importer verifies local and hosted archive checksums before updating assets.json and the seven canonical generated bindings. Archives remain ignored downloads. Do not hand-edit bindings. Rebuild and validate Install dependencies with bun install --frozen-lockfile. From packages/compositor, install missing cross-compilation toolchains with bun install-toolchain.ts, then run bun run build-all. Require all seven targets: Windows x64 GNU, macOS ARM64/x64, Linux ARM64/x64 GNU/musl. On macOS, use an MSVCRT-targeting x8664-w64-mingw32-gcc. Verify objdump -p packages/compositor-win32-x64-msvc/remotion.exe imports msvcrt.dll and no api-ms-win-crt- or ucrtbase.dll. From the repository root, run bun run build, bun run stylecheck, and git diff --check. Inspect the FFmpeg metadata/binding changes and all seven rebuilt compositor packages. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills remotion-dev/update-ffmpeg