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POST
Adjust Speed
Adjust the playback speed of an existing clip. Returns a new clip with the adjusted speed.

Request Body

string
required
The source clip ID to adjust speed for.
number
required
Speed multiplier value between 0.25 and 4.0.
boolean
default:"true"
Whether to keep the original pitch when adjusting speed.
  • true: Maintains original pitch (recommended)
  • false: Pitch changes with speed
string
Optional new title for the adjusted clip.

Response

string
The task ID. Use this to query task status via Get Task Status.

Example

Response Example

Set keep_pitch to true to maintain the original vocal character when speeding up or slowing down. This uses time-stretching algorithms to preserve pitch.
Extreme speed adjustments (close to 0.25 or 4.0) may result in audio artifacts. For best quality, stay within 0.75 - 1.5x range.