⏩Change Video Playback Speed
Slow down or speed up video playback. Useful for fast-listening to lectures at 1.5–2x, slow-motion analysis of golf swings and workouts, compressing cooking videos, and breaking down dance choreography. Based on ffmpeg.wasm.
How to use
- 1Upload your video.
- 2Choose a speed (0.25x · 0.5x · 1.5x · 2x · 3x · 4x).
- 3Convert and download.
FAQ
Does audio change with the video?+
Yes. Both video and audio scale at the same rate — faster means higher-pitched, slower means lower.
Can I keep pitch while changing speed?+
Audio scales proportionally in this tool. For pitch-preserved playback rate change, use audio editing software like Audacity.
Does 2x make the file half size?+
Same bitrate, shorter video — file size usually drops by about half.
Isn't 0.25x too slow?+
It's useful for detailed analysis of golf swings, science experiments, and dance choreography. For just slow viewing, 0.5x is usually enough.
Frames look choppy — why?+
Slowing 30fps source makes the same frame repeat, looking choppy. Source shot at 60fps+ stays smoother.
How long does processing take?+
About 1–2x the video length. For long videos, trim the part you need first with the Video Trim tool.