> ## Documentation Index
> Fetch the complete documentation index at: https://docs.medera.info/llms.txt
> Use this file to discover all available pages before exploring further.

# Respiration Rate

> Breaths per minute from rPPG amplitude modulation

RR is computed by `_extract_respiration_rate(rgb_traces, fps)` from rPPG amplitude envelope.

| Field                    | Unit             |
| :----------------------- | :--------------- |
| `respiration_rate`       | breaths / minute |
| `respiration_confidence` | 0–1              |

Minimum duration: 30 s.