Change Video Speed
Speed up or slow down a clip. Pitch correction keeps speech sounding natural.
How to change video speed
- Drop a video in.
- Pick a speed from the presets or use the slider for a specific multiplier.
- Enable pitch correction to keep voices sounding natural, then download.
About this tool
Changing video speed sounds like a simple operation — multiply the frame duration — and at the video level it mostly is. The complication is audio. A raw speed change shifts pitch along with tempo: double speed plays an octave higher, half speed drops an octave. For music and speech that is usually unacceptable. Pitch correction (time-domain pitch shifting) separates the two, adjusting tempo while keeping pitch stable. The quality of this separation degrades at extreme ratios, but in the range most editors actually use it is transparent.
True slow motion requires the source to have been recorded at a high frame rate. Slowing a standard 30 fps clip means the same frames are displayed longer, and motion will look choppy for anything faster than a gentle pan. High-speed recording — 60, 120 or 240 fps — is what gives the smooth slow-motion look because there are genuinely more frames to stretch across the same playback time.