Function changeSpeed

changeSpeed(opts: ChangeSpeedOptions): Promise<void>
Change playback speed of a video, keeping audio pitch-corrected. Chains multiple atempo filters for speed values outside 0.5–2.0.
Parameters
- opts: ChangeSpeedOptions
Returns Promise<void>
Example
```
await changeSpeed({ input: 'in.mp4', output: 'out.mp4', speed: 2.0 });
await changeSpeed({ input: 'in.mp4', output: 'out.mp4', speed: 0.25 }); // 4x slow-mo
```
- Defined in src/helpers/edit.ts:92