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How to export a narrated capture as a shareable MP4 with Scrawl

Turn a bundle into an MP4 with the activity cropped, ink burned in, audio kept, and optional auto-zoom.

Credentials. An exported MP4 shows the screen and narration as recorded, so anything sensitive on screen is shared with whoever receives the file.

Who it is forA product or support person who needs to share a recorded walkthrough with a teammate or a bug tracker.

The problemA raw screen recording is long and unfocused, and it is hard to send to someone who does not use an agent.

The outcomeA short MP4 with the activity cropped to the important area, the marks visible, and the narration intact.

What you need first

  • An Apple silicon Mac running macOS 26 or later (or Windows 10 2004 or later, x64, preview build)
  • Screen & System Audio Recording, Microphone, and Accessibility permissions granted during onboarding
  • Claude Code, Codex, or another agent that can read the pasted contact sheet and summary.md
  • For the source-build steps: a Rust toolchain with cargo

Steps

  1. Install Scrawl and record a capture with ⌥⇧S.
  2. Turn on Video export under Experimental in the Recording pane of Settings.
  3. From a source checkout, run cargo run -- export latest --zoom --out /tmp/demo.mp4.
  4. Open /tmp/demo.mp4 and check the crop, the ink, and the audio before you share it.

Prompt for your agent

In the Scrawl repo, run `cargo run -- export latest --zoom --out <output.mp4>` and report the output path and duration. Verify that the MP4 plays with audio and that the ink marks are visible.

Caveat. Video export sits under Experimental in Settings and needs a source build or that setting turned on, so check that it is available in your build first.

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