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Bezmaksas Video Speed Changer

Speed up or slow down a video from 0.25× to 4×, with pitch-corrected audio. Great for slow-motion and timelapse. Runs entirely in your browser.

Nav faila izmēra ierobežojumaFaili paliek privātiNav nepieciešama pieteikšanāsBezmaksas uz visiem laikiem

Nometiet failus šeit vai noklikšķiniet, lai pārlūkotu

MP4, WebM, MOV, AVI, Video nav faila izmēra ierobežojuma

Pārlūkot failus

Jūsu faili nekad neatstāj jūsu ierīci. Visa apstrāde notiek lokāli jūsu pārlūkprogrammā.

Speed up or slow down a video (0.25×–4×), with pitch-corrected audio. Runs entirely in your browser.

Optimize for your platform

Make a Slow-Motion Video Speed Up a Video / Timelapse Speed Up a Tutorial or Lecture Speed-Ramp a Clip for Social Slow a Video Down to Analyse It

Kā tas darbojas

Speeding up or slowing down a video means re-timing both the picture and the sound. This does it with FFmpeg in your browser, keeping the audio pitch natural.

1
FFmpeg.wasm loads once
The WebAssembly build of FFmpeg (~30 MB) downloads on first use and is cached afterwards.
2
You pick a speed
From 0.25× (slow motion) to 4× (fast forward / timelapse feel). Your file stays in the browser.
3
Video and audio are re-timed
The video uses setpts to change frame timing; audio uses chained atempo filters that stretch time without altering pitch, so voices stay natural.
4
You download the result
The re-timed MP4 is offered for download and previewed in-page.