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SnapOtter/apps/docs/tools/video/video-speed.md
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---
description: Speed up or slow down a video.
---
# Video Speed
Speed up or slow down a video with an option to preserve audio pitch.
## API Endpoint
`POST /api/v1/tools/video/video-speed`
Accepts multipart form data with a video file and a JSON `settings` field.
## Parameters
| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| factor | number | No | `2` | Speed multiplier (0.25-4). Values above 1 speed up, below 1 slow down |
| keepPitch | boolean | No | `true` | Preserve audio pitch when changing speed |
## Example Request
```bash
curl -X POST http://localhost:1349/api/v1/tools/video/video-speed \
-H "Authorization: Bearer si_your-api-key" \
-F "file=@clip.mp4" \
-F 'settings={"factor": 0.5, "keepPitch": true}'
```
## Example Response
```json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/clip.mp4",
"originalSize": 12500000,
"processedSize": 24800000
}
```
## Notes
- A factor of `2` doubles playback speed (halves duration). A factor of `0.5` halves playback speed (doubles duration).
- When `keepPitch` is `true`, the audio is time-stretched so voices sound natural. When `false`, pitch shifts proportionally with speed.
- The valid range is 0.25x to 4x.