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

# ffmpeg and HyperFrames

> Deterministic rendering under sealed production authority.

## How Harmonia uses it

ffmpeg and HyperFrames transform authorized source or generated media into clips and compositions. Host code supplies verified local inputs, source windows, captions, dimensions, frame rate and audio controls. These binaries are not model-accessible effect tools.

The production executor resolves and verifies input bytes before rendering. It assembles the composition, renders it, mixes audio, inspects the output and applies the bounded repair path when required. Paid generation and public publication have separate authorization boundaries.

## Failure and verification

Missing binaries, malformed media, unsupported operations, process failures and empty outputs remain errors. A persisted artifact or saved digest alone is not independent verification: the verification path reads stored bytes and recomputes the digest.

## Evidence status

`agent/harmonia_agent/production_executor.py`, `clipper.py` and the HyperFrames tooling in the worker image define rendering. Local tests can establish byte-level behavior. The AWS container deployment and an authenticated end-to-end export remain unverified.