Performance
- Smoother frame scrubbing — the live preview now draws immediately on each seek instead of waiting for the frame-decode guard the Safari fix (1.3.0) added on every scrub step, restoring responsive scrubbing. The thumbnail blob is encoded once when you settle on a frame rather than on every intermediate frame.
- Faster WebM scrubbing — WebM (VP8/VP9) isn't hardware-decoded on most hardware and has sparse keyframes, making exact-time seeks expensive. Dragging now uses
video.fastSeek()(Safari/Firefox) to snap to the nearest keyframe for a responsive scrub; the exact frame you land on is captured on settle. MP4 keeps exact seeking, so its live preview stays frame-accurate.
The saved thumbnail remains a correctly decoded, exact frame for all formats — the Safari-safe capture is preserved for the settled frame.