Opus is an audio codec already supported by the HTML5 src attribute on <url> elements. This applies to mp4, ogg, and webm containers as well as in webm containers using Media Source Extensions. This change adds support for the Opus codec in the mp4 container to MSE.

Demos

• https://googlechrome.github.io/samples/media/opus-in-mp4-for-mse.html
• http://storage.googleapis.com/dalecurtis/mse.html?type=mp4_opus&src=bbb-opus.mp4

Documentation

• https://www.w3.org/TR/mse-byte-stream-format-isobmff/
• https://chromium-review.googlesource.com/c/chromium/src/+/1178929

Specification

Specification link

Status: Specification currently under development in a Working Group

Status in Chromium

Blink components: Internals>Media

Implementation status: Enabled by default (tracking bug)

Consensus & Standardization

• Firefox: Shipped/Shipping
• Safari: No signal
• Web Developers: Positive

Owner

• dalecurtis@chromium.org

Comments

Support regressed in Firefox at some point after introduction in 50 until being fixed within version 63.

Last updated on 2021-12-21