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.




Working draft or equivalent

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 70
  • Chrome for Android release 70
  • Android WebView release 70

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Shipped/Shipping
  • No signal
  • No signal
  • Positive



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

Last updated on 2021-05-05