混乱するので、まとめ。
| 種別 | Input | Output | Delegate | Delegate |
| Camera | AVCaptureDevice video | AVCapture PhotoOutput | AVCapture PhotoCaptureDelegate | photoOutput |
| LivePhoto | AVCaptureDevice video, audio | AVCapture PhotoOutput | AVCapture PhotoCaptureDelegate | capturePhoto |
| Video | AVCaptureDevice video, audio | AVCapture MovieFileOutput | AVCapture FileOutputRecordingDelegate | fileOutput |
| Face Detection | AVCaptureDevice video | AVCapture VideoDataOutput | AVCapture VideoDataOutputSampleBufferDelegate |
