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Chrona

Local video frame extractor

Open editor

Use FFmpeg when the job belongs in a repeatable pipeline.

The Chrona CLI wraps native FFmpeg with the same trim, timing, manifest, and archive rules as the browser editor.

Open the local editor

A quick start

Install or run the pinned CLI, inspect the input, then extract to a ZIP. Machine-readable results go to stdout when you pass --json; progress can go to stderr as JSON Lines.

  • npx -y chrona-cli@0.1.0 --json doctor
  • npx -y chrona-cli@0.1.0 --json probe ./video.mp4
  • npx -y chrona-cli@0.1.0 --json extract ./video.mp4 --output frames.zip

Why use the CLI

The CLI reads local paths, uses native FFmpeg and FFprobe, streams archive entries to disk, and supports explicit binary paths. It is a better fit for automation, unusual codecs, and large outputs than a browser tab.

Move decisions between surfaces

Chrona plan files contain edit decisions, not source media. Build a plan visually in the browser, then run it with native FFmpeg in a shell or agent workflow.