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Keyframe Extraction: Export JPG at a Timestamp — Tutorial

Upload a video, seek in the fullscreen desk, and export JPG frames at the current playback time—useful for covers, steps, and highlight stills.

Keyframe Extract Tool Interface

Features

  • Fullscreen workbench after upload; stage media box fits the video’s real aspect ratio (contain).
  • Local capture: <video> preview + <canvas> JPG output—nothing is uploaded; no native browser controls (bottom Play/Pause).
  • Bottom bar toggles Play / Extract with play/camera icons: paused or in preview → Play; while playing → Extract (pauses video, no auto preview).
  • Toolbar: Reset, speed 0.5×–3.0×, center frame jumps (back 20f/5f/1f and forward 1f/5f/20f), Extract, Download all (ZIP).
  • Thumbnail strip: capture many frames; scroll horizontally when the strip overflows.
  • Site-wide preview: top-right Delete / Download / Close; left/right Prev / Next; ← / → keys; delete shows a toast and jumps to the next frame.

How to Use

  1. Open Keyframe Extraction.
  2. Choose mp4 / webm / mov (recommended) or another playable format — max 100MB.
  3. Seek with the top frame-jump buttons; adjust speed if needed.
  4. While playing, click Extract; after each capture click Play to continue.
  5. Open a thumbnail to preview, navigate with side buttons or keys, delete from the top-right; Download all for a ZIP; Reset clears and returns to upload.

Notes

  • Captures the frame at the current playback time, not automatic shot-change detection.
  • Frames live in page memory until you download or reset; refresh clears them.
  • wmv / mkv / avi work only if the browser can play them.
  • Runs locally in the browser—no server upload.

Related Keywords

Keyframe Extraction, Keyframe Extract, video frame capture, keyframeextract, Sanye Hub, JPG, ZIP