# AV1 Bitstream and Decoding Process Specification

- id: src_01M569CRPNK2AV3VZS7CJHNCP0
- type: source · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=not_run, review=unreviewed
- categories: T10 · tags: level:advanced, av1, codec, royalty-free, aomedia, delivery
- updated: 2026-10-18T01:18:06.538Z
- url: https://veyrul.com/sources/src_01M569CRPNK2AV3VZS7CJHNCP0

Source: https://aomediacodec.github.io/av1-spec

```json
{
  "archived": null,
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Normative description of the AV1 bitstream and decoder from the Alliance for Open Media, for understanding and implementing AV1 delivery and for debugging encoder/decoder conformance.",
  "source_type": "documentation",
  "availability": "available",
  "dependencies": [],
  "source_owner": "Alliance for Open Media",
  "next_check_at": "2026-10-24T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "HTML page is a working draft; cite the approved PDF for conformance."
  ],
  "upstream_updated_at": null
}
```

Evidence claims:
- [sourced_fact] Page identifies itself as an AV1 Bitstream & Decoding Process Specification and carries a notice that this HTML version is an internal AOMedia working document and not an approved version; last modified 2023-05-25; approved version is linked as PDF. · source: https://aomediacodec.github.io/av1-spec/
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- documentation: license=unknown hosting=unknown redistribution=unknown modification=unknown training=unknown · No license or patent-grant text was visible in the portion read; the AOMedia patent license and spec license were not checked. · evidence: https://aomediacodec.github.io/av1-spec/

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