WebRTC 112 Release Notes

[Harald Alvestrand]

WebRTC M112 is going to be released as part of Chrome M111 , currently planned for release on  April 4th 2023.

Three PSAs were published that may require action from developers:

• PSA: wildcard rtcp-fb is coming to Chromium M112+ (currently reverted but it is a good idea to make sure your code is dealing with this)

• PSA: EncodedImage::SpatialIndex() will stop returning simulcast index

• PSA: cricket::MediaChannel is going away

In addition to this, please note that the legacy stream statistics are disabled by default in M112. If you still rely on them you need to register for the corresponding deprecation trial.

In terms of features the highlights for this release is the reordering of the tabs in the getDisplayMedia picker which improves privacy described in this blog post and which is now enabled by default in non-Chrome browsers as well.

The following issues were marked as fixed or verified and had at least one commit in M112 (build, test and trivial code changes are not included):

Issue	Summary	Component
chromium:1414370	Remove unused WebRtc encoded frame GetAdditionalData() methods	Blink>WebRTC
webrtc:11404	Add AV1 encoder and decoder wrapper behind flags	Video
webrtc:11803	AEC3: Misaligned render buffer when external delay estimates and initial capture calls	Audio
webrtc:12397	Audio RTP timestamps does not increment when RTCRtpEncodingParameters.active is set to false.	Audio
chromium:1410691	STATUS_ILLEGAL_INSTRUCTION on VIA Eden X4 C4450 CPU	Blink>WebRTC>Audio, Blink>WebRTC
webrtc:13279	Audio mlines shouldn't advertise rid/rrid header extension support	PeerConnection
webrtc:14817	Video receive streams may be re-created when SSRCs are unsignaled causing GetSources() history to be cleared	Video
webrtc:14894	Update DXGI capturer to re-initialize when a monitor's DPI changes	DesktopCapture
chromium:1411614	Contributing sources are never set on received RTCEncodedVideoFrame.getMetadata()	Blink>WebRTC
chromium:1406331	VP8 encoder scales threads quickly, make max threads configurable	Blink>WebRTC, Blink>Media>Video
webrtc:11031	Retransmission can fail when MID has been negotiated [Unified Plan]	Network>RTP
webrtc:9734	Potential bad performance with simulcast screensharing	Video
webrtc:4690	VoE API Refactoring Tracking Bug	Audio
webrtc:14885	Add test coverage for simulcast where media flows	Video
webrtc:14872	Treat Unrecognized Data Channel Protocols as Unsupported Media	PeerConnection, SpecConformance
webrtc:14875	Remove webrtc::VideoStreamDecoderInterface	Cleanup,Video
webrtc:14910	Implement PeerConfigurer audio encoder/decoder factory setters	Tools
chromium:1414370	Remove unused WebRtc encoded frame GetAdditionalData() methods	Blink>WebRTC
chromium:1410129	media::AudioProcessor should not push the reference into WebRTC if there is no echo cancellation	Blink>WebRTC>Audio
chromium:1375217	tracking bug for webrtc-internals ui/ux improvements	Blink>WebRTC>Tools
chromium:1417654	Collect UKM tracking {preferCurrentTab: true}	Blink>GetDisplayMedia
chromium:1358278	Media Picker Reordering - Tracking Bug	Blink>GetDisplayMedia
chromium:1406874	Echo cancellation of WebAudio playing to a non-default output device	Blink>WebAudio, Blink>GetUserMedia
chromium:1411703	WebRTC Insertable Streams: add RTP sequence number to incoming audio frames	Blink>WebRTC

For the full list of commits please refer to the git log between this branch and the previous branch.

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.

These release notes were prepared by Philipp Hancke.

[Philipp Hancke]

part of Chrome M112 obviously

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