Function adjustVolume

adjustVolume(opts: AdjustVolumeOptions): Promise<void>
Adjust volume by a multiplier or dB value.
Parameters
- opts: AdjustVolumeOptions
Returns Promise<void>
Example
```
await adjustVolume({ input: 'in.mp4', output: 'out.mp4', volume: '0.5' });
await adjustVolume({ input: 'in.mp4', output: 'out.mp4', volume: '6dB' });
```
- Defined in src/helpers/normalize.ts:106