capture_supports_444 was an encoder-backend fact (direct NVENC or PyroWave) logged under a capture-ish name — a field report burned real time hunting a capture problem because of it. The 'encode chroma' line now says ingest_chain_supports_444, a requested-but-declined session logs WHICH gate lost, and the console UI's Full chroma explainer names the real requirement. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>