Import Canvas Capture

This is an internal, unstable workflow. Keep this skill in .agents/skills; do not distribute it through packages/skills or document the command as a stable API.

Workflow

1. Locate the recorded capture file and the target Remotion project. The original recording must contain embedded REMOTION_CAPTURE_DATA metadata; a converted video that has lost this metadata cannot be imported.

2. Inspect the project to find the TypeScript file containing its composition registrations (usually src/Root.tsx). Choose an unused composition ID.

3. From the target project's root, run:

   bunx remotion experimental-codemod add-canvas-capture /absolute/path/capture.webm \
     --composition-file src/Root.tsx \
     --id MyCapture

   When developing this command in the monorepo, build the CLI first with bun run build, then invoke the local CLI from the target project's root:

   node /absolute/path/to/remotion/packages/cli/remotion-cli.js \
     experimental-codemod add-canvas-capture /absolute/path/capture.webm \
     --composition-file src/Root.tsx --id MyCapture

4. Review the reported source files and public asset. The importer generates a component beside the registration file, registers it, copies the video to the public directory, and installs missing @remotion/media and @remotion/mac-cursors dependencies at the project's Remotion version. Studio does not need to be running. Existing Studio sessions pick up source changes through their file watchers; this operation does not enter Studio's undo stack.

5. Report the composition ID and changed files to the user.

Options and conflicts

• Defaults match Studio's capture import: 1920×1080, 60 fps, and duration rounded up from the recording. Pass --width, --height, or --fps to override them. Recorded video dimensions remain independent from composition dimensions.
• --public-dir overrides the configured public directory. --package-manager selects the dependency installer.
• --dry-run parses the recording and generates source changes without installing dependencies or writing project files. The programmatic result includes the proposed source changes.
• The registration file is resolved relative to the project root; the CLI capture path is resolved relative to the current working directory.
• Existing component files and conflicting public assets are rejected. If the recording is already in the public directory, pass that file as the input to reuse it. Otherwise rename the input or select another composition ID; do not overwrite an existing asset or component to bypass an error.

Programmatic access

Use CliInternals.importCanvasCapture from @remotion/cli. It is internal and unstable. Its inputs are captureFile, compositionFile, compositionId, remotionRoot, publicDir, fps, width, height, packageManager, logLevel, and dryRun. Supply null for default directory, dimensions, frame rate, and package manager. File paths are resolved relative to remotionRoot.

The result contains the composition ID, source and asset paths, composition metadata, and codemod changes. Pass dryRun: true to inspect changes in memory.