PSA: WebRTC M94 Release Notes

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Huib Kleinhout

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Sep 24, 2021, 8:38:30 AM9/24/21
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WebRTC M94 Release Notes


Branch: WebRTC M94 branch

Summary

WebRTC M94, currently available in Chrome's beta channel, contains 1 new features and over 19 bug fixes, enhancements and stability/performance improvements. We encourage all developers to run versions of Chrome on the Canary, Dev, and Beta channels frequently and quickly report any issues found. Please take a look at this page, for some pointers on how to file a good bug report. The help we have received has been invaluable!

Note that the WebRTC release notes only cover WebRTC specific changes. Follow the Chromium and Chrome releases blog for further updates on important changes in Chrome releases.

We strongly recommend WebRTC developers to fully test their services in Chrome beta to ensure stability for end-users.

The Chrome release schedule can be found here

PSAs & Features

Title

Description

MediaTrack Insertable Streams

The Insertable streams API for MediaStreamTrack is now available as a stable web api and no longer needs an Origin Trial! The API can be used to directly access and modify audio/video streams. Read more about it here: https://web.dev/mediastreamtrack-insertable-media-processing/

nonstandard RTCConfiguration.offerExtmapAllowMixed option has been removed from Chrome

the non-standard offerExtmapAllowMixed in the RTCPeerConnection constructor was removed in M94. See also the intent to remove https://groups.google.com/a/chromium.org/g/blink-dev/c/Plik-x6biZ0/m/eJ8P1iy0AQAJ for details and how to do SDP manipulation before calling setRemoteDescription where required.


Features and Bugfixes

Type

Issue

Description

Component

Bug

http://crbug.com/1084702

Mobile Chrome on Pixel 3 has video corruption for non-16-aligned resolutions in WebRTC calls : Hardware VP8 encoder bug

Blink>WebRTC>Video,Internals>GPU>Video,Internals>Media>Capture

Feature

http://crbug.com/1225701

Enable DCHECKS by default for developer builds

Build

Bug

http://crbug.com/1232358

Broken Dependency Descriptor (DD) RTP extension when enabling AV1-SVC in WebRTC

Blink>WebRTC

Bug

http://crbug.com/1234779

Peer Connection with a=inactive on the remoteDescription still sends RTP.

Blink>WebRTC>PeerConnection

Bug

http://crbug.com/1236202

Merge request: PeerConnection assumes all new m= sections will go in the first BUNDLE group

Blink>WebRTC>PeerConnection

Bug

http://crbug.com/999886

code base vs clang r370594: -Wfinal-dtor-non-final-class

Build,Tools>LLVM

Bug

http://bugs.webrtc.org/11640

Support for RFC 2198 redundancy

Audio

Bug

http://bugs.webrtc.org/12470

Recurrent and empty RTP packets with gaps in sequence number

Network>RTP

Bug

http://bugs.webrtc.org/12837

PC emits candidates when renegotiating

PeerConnection

Bug

http://bugs.webrtc.org/12906

PeerConnection assumes all new m= sections will go in the first BUNDLE group

PeerConnection

Bug

http://bugs.webrtc.org/12975

video_replay's aspect ratio is hard-coded.

Tools

Bug

http://bugs.webrtc.org/12980

Jitter stats for video are much higher than expected

Stats

Bug

http://bugs.webrtc.org/12988

Prepare WebRTC for Chromium's switch of dcheck_always_on default value

Build

Bug

http://bugs.webrtc.org/12989

NackModule2 during 50 tiles can potentially cause 2.5 kHz idle wakeups

Internals

Bug

http://bugs.webrtc.org/12991

AVC parsing error when hardware acceleration is turned on in Chrome Windows

Video

Bug

http://bugs.webrtc.org/12995

FrameEncryptorInterface is unusable with video

PeerConnection

Bug

http://bugs.webrtc.org/13037

Encoded framerate stats per layer is incorrect.

Stats,Video

Bug

http://bugs.webrtc.org/13053

iSAC tests on Mac ARM64 started failing after chromium roll

Audio,Build

Bug

http://bugs.webrtc.org/4299

Remove a=ice-options:google-ice from generated offers

PeerConnection

Bug

http://crbug.com/1231698

display-capture (permission policy)

Blink>GetDisplayMedia


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