Video Speed

Speed up or slow down a video with an option to preserve audio pitch.

API Endpoint

POST /api/v1/tools/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

curl -X POST http://localhost:1349/api/v1/tools/video-speed \
  -H "Authorization: Bearer si_your-api-key" \
  -F "[email protected]" \
  -F 'settings={"factor": 0.5, "keepPitch": true}'

Example Response

{
  "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.