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Chrona

Local video frame extractor

Open editor

Trim the source before you build the frame archive.

Keep only the useful ranges, then export a stitched PNG sequence without creating a temporary edited video first.

Open the local editor

Make the edit decision first

Set a start and end, then add cuts for sections you do not want. Chrona keeps those decisions as half-open ranges, so a boundary belongs to one side only and adjacent cuts do not duplicate a frame.

The exported sequence follows the kept ranges

After extraction, frame_000001.png is the first retained frame, even when it came from the middle of the source. The manifest records both stitched output time and source time for each frame.

Why trim before extraction

Removing unused ranges reduces frame count, ZIP size, and local processing time. You can preview the estimate before the browser worker starts the extraction.