Per-frame quantizer in VideoEncoder

Category: Multimedia
Type: Chromium catches up
Status: Enabled by default (Chrome 117)
Intent stage: None

Summary

Adds "quantizer" VideoEncoderBitrateMode for VideoEncoder. This allows to specify quantizer parameter for each frame for AV1, VP9, and AVC video codecs. Explainer: https://gist.github.com/Djuffin/3722232679b977058be787be0dff4254

Standards & signals

Specification: https://www.w3.org/TR/webcodecs/#video-encoder-bitrate-mode
Firefox: Neutral — Paul Adenot (Mozilla) expressed that minor changes to WebCodecs spec don't need to go through full "Request for Mozilla Position" process assuming they were approved by the Media Working Group.
Safari: Positive — The issue was discussed on 07 March 2023 by w3c Media working group. Jer Noble (Apple) was actively actively participating and provided input for spec details. https://www.w3.org/2023/03/07-mediawg-minutes.html#t02
Web developers: Positive — People ask for this on GitHub
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1424154

View on chromestatus.com