av1_codec_registration.src.html

<pre class='metadata'>
Title: AV1 WebCodecs Registration
Repository: w3c/webcodecs
Status: NOTE-ED
Shortname: webcodecs-av1-codec-registration
Level: none
Group: mediawg
ED: https://w3c.github.io/webcodecs/av1_codec_registration.html
TR: https://www.w3.org/TR/webcodecs-av1-codec-registration/
Editor: Paul Adenot, w3cid 62410, Mozilla https://www.mozilla.org/
Editor: Bernard Aboba, w3cid 65611, Microsoft Corporation https://www.microsoft.com/
Former Editor: Chris Cunningham, w3cid 114832, Google Inc. https://www.google.com/

Abstract: This registration is entered into the [[webcodecs-codec-registry]].
    It describes, for AV1, the (1) fully qualified codec strings,
    (2) the codec-specific {{EncodedVideoChunk}}
    [=EncodedVideoChunk/[[internal data]]=] bytes, (3) the
    {{VideoDecoderConfig.description}} bytes, and (4) the values of
    {{EncodedVideoChunk}} [=EncodedVideoChunk/[[type]]=].

    The registration is not intended to include any information on whether a
    codec format is encumbered by intellectual property claims. Implementers and
    authors are advised to seek appropriate legal counsel in this matter if they
    intend to implement or use a specific codec format. Implementers of
    WebCodecs are not required to support the AV1 codec.

    This registration is non-normative.

Markup Shorthands:css no, markdown yes, dfn yes
!Participate: <a href="https://github.com/w3c/webcodecs">Git Repository.</a>
!Participate: <a href="https://github.com/w3c/webcodecs/issues/new">File an issue.</a>
!Version History: <a href="https://github.com/w3c/webcodecs/commits">https://github.com/w3c/webcodecs/commits</a>
</pre>

<pre class='anchors'>
spec: WEBCODECS; urlPrefix: https://w3c.github.io/webcodecs/#
    type: attribute
        text: EncodedVideoChunkMetadata.decoderConfig; url: dom-encodedvideochunkmetadata-decoderconfig
        for: EncodedVideoChunkType; text: key; url: dom-encodedvideochunktype-key
        text: VideoDecoderConfig.description; url: dom-videodecoderconfig-description
    type: dfn
        for: EncodedVideoChunk; text: [[internal data]]; url: dom-encodedvideochunk-internal-data-slot
        for: EncodedVideoChunk; text: [[type]]; url: dom-encodedvideochunk-type-slot
        for: VideoEncoder; text: [[output callback]]; url: dom-videoencoder-output-callback-slot
    type: interface
        text: EncodedVideoChunk; url: encodedvideochunk
        text: VideoEncoder; url: videoencoder
    type: dictionary
        text: VideoEncoderConfig; url: dictdef-videoencoderconfig
        text: VideoDecoderConfig; url: dictdef-videodecoderconfig
</pre>

<pre class='biblio'>
{
  "AV1": {
    "href": "https://aomediacodec.github.io/av1-spec/",
    "title": "AV1 Bitstream & Decoding Process Specification",
    "publisher": "Alliance for Open Media"
  },
  "AV1-ISOBMFF": {
    "href": "https://aomediacodec.github.io/av1-isobmff/",
    "title": "AV1 Codec ISO Media File Format Binding",
    "publisher": "Alliance for Open Media"
  }
}
</pre>

Fully qualified codec strings {#fully-qualified-codec-strings}
==============================================================

The codec string begins with the prefix `"av01."`, followed by a variable length
suffix as described in Section 5 of [[AV1-ISOBMFF]].

EncodedVideoChunk data {#encodedvideochunk-data}
================================================

{{EncodedVideoChunk}} [=EncodedVideoChunk/[[internal data]]=] is expected to be
data compliant to the "low-overhead bitstream format" as described in Section 5
of [[AV1]].

VideoDecoderConfig description {#videodecoderconfig-description}
================================================================

{{VideoDecoderConfig.description}} is not used for this codec.

EncodedVideoChunk type {#encodedvideochunk-type}
================================================

If an {{EncodedVideoChunk}}'s [=EncodedVideoChunk/[[type]]=] is
{{EncodedVideoChunkType/key}}, then the {{EncodedVideoChunk}} is expected to
contain a frame with a `frame_type` of `KEY_FRAME` as defined in Section
6.8.2 of [[AV1]].

Privacy Considerations {#privacy-considerations}
==========================================================================

Please refer to the section [[WEBCODECS#privacy-considerations|Privacy
Considerations]] in [[WEBCODECS]].

Security Considerations {#security-considerations}
==========================================================================

Please refer to the section [[WEBCODECS#security-considerations|Security
Considerations]] in [[WEBCODECS]].