Ability to play the open source WebRTC preferred audio codec - Opus in MSE and <video> tags on the for the webM and matroska containers. Please note that we have had Opus support in chromium since M25. This change enables Opus playback on MSE and <video> tags.


Specification link

Final published standard: Recommendation, Living Standard, Candidate Recommendation, or similar final form

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

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



Opus is a standards supportive, open source codec. It is the MTI codec for WebRTC and has been in chromium since M25. This change enables us to use Opus in MSE and <video> tags for WebM and Matroska containers. The standards body for Matroska has also approved and the spec is attached.

Last updated on 2021-05-05