Slow motion, fast forward and time-lapse
Changing the speed changes how long each frame is shown. At 2× a 60-second video lasts 30 seconds; at 0.5× it lasts two minutes. To keep a normal frame rate, frames are skipped when speeding up and repeated (or blended) when slowing down.
Simply playing audio faster also raises its pitch. This tool uses time-stretching (WSOLA) so voices and music keep their natural pitch — choose “Pitch follows speed” if you want the classic tape effect.
The smoothest slow motion comes from footage recorded at a high frame rate (60, 120 or 240 fps). Slowing a 240 fps phone clip to 0.25× gives real 60 fps slow motion; for normal 30 fps clips, frame blending makes the movement look less choppy.
Common speeds
| Speed | Effect | 1-minute video becomes |
|---|---|---|
| 0.25× | Strong slow motion | 4 minutes |
| 0.5× | Slow motion | 2 minutes |
| 1.5× | Faster tutorials, podcasts | 40 seconds |
| 2× | Fast forward | 30 seconds |
| 4× | Speed-up for social media | 15 seconds |
| 8×–16× | Time-lapse | 7.5 – 3.75 seconds |
Tips
- Want to change frames per second without changing the speed? Use the Video FPS Converter.
- Cut the part you want to speed up first with the Video Trimmer.
- Sped-up clips make great GIFs — try Video to GIF.
- At speeds above 4× consider muting the audio.