Add RTP timestamp to RTCRtpReceiver.RTCRtpContributingSource. This is additional metadata to the existing RTP source.


This is needed to make it possible to link the information in RTCRtpContributingSource to a specific video/audio frame. One use case is a server-client WebRTC system where the client can now synchronize external events to a particular source frame and send this information back to the server.



Specification link

Specification being incubated in a Community Group

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.

  • Positive
  • No signal
  • No signals


Last updated on 2021-12-13