Source: https://guthlabs.ai/docs/instruments/data-rate-storage-planner-camera-codecs/implementation/

instrument implementation / implementation-contract

# Data Rate / Storage Planner (Camera Codecs) implementation

A source-bound implementation contract for Data Rate / Storage Planner (Camera Codecs); deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t7-040

**Effect**: Computation or source lookup only

## Input and validation requirements

A card size of exactly zero makes the cards-needed calculation undefined due to division by zero; the instrument should reject that input. The convention probe also shows materially different results if duration units are misread.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "codec_preset": "Apple ProRes 422 HQ",
    "resolution": "3840x2160",
    "fps": 30,
    "duration_s": 3600,
    "card_capacity_GB": 128
  },
  "expected_outputs": {
    "data_rate_Mbps": 707,
    "data_rate_MB_s": 88.375,
    "storage_GB": 318.15,
    "cards_needed": 3
  },
  "reference_data": {
    "codec": "Apple ProRes 422 HQ",
    "resolution": "3840x2160",
    "fps": 30,
    "nominal_data_rate_Mbps": 707,
    "source_convention": "widely tabulated standard value; Apple ProRes manufacturer nominal-rate table"
  },
  "working": "1. Convert rate: 707 Mbps ÷ 8 = 88.375 MB/s. 2. Storage: 88.375 MB/s × 3,600 s = 318,150 MB. 3. Convert to decimal GB: 318,150 MB ÷ 1,000 = 318.15 GB. 4. Cards: ceil(318.15 GB ÷ 128 GB) = ceil(2.485546875) = 3 cards."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/data-rate-storage-planner-camera-codecs/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/data-rate-storage-planner-camera-codecs/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/data-rate-storage-planner-camera-codecs/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche7/tranche7-results.json`