PSA: WebRTC M85 Release Notes

[Anatoli Davidson]

WebRTC M85 Release Notes

WebRTC M85 branch (cut at r31567)

Summary

WebRTC M85, currently available in Chrome's beta channel, contains 3 new features and over 25 bug fixes, enhancements and stability/performance improvements. As with previous releases, 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! 

The Chrome release schedule can be found here.

Deprecations

Issue	Description	Component
11637	Remove RTP frame-marking extension	Network>RTP
11610	The receive_crit_ lock can be removed from Call	Internals
11632	Remove length from SingleProcessEncodedImageDataInjector::ExtractionInfo, use SpatialLayerFrameSize instead	Video
11664	Remove Opus packet loss rate optimization	Audio

Features and Bugfixes

Type	Issue	Description	Component
Feature	11631	Add support for multiple peers in DefaultVideoQualityAnalyzer	Internals
Feature	11463	Connection::Reset()	Network>ICE
Feature	11627	Add HEVC codec name to media constants	Video
Bug	11704	iSAC encoder: Target bitrate can only be set at construction time	Audio
Bug	1072401	TURN server URL can be used for TCP portscanning	Blink>WebRTC>PeerConnection
Bug	1030631	DataChannel doesn't fire error event on close-with-error	Blink>WebRTC>PeerConnection
Bug	11654	VP9 SVC may get stuck sending low resolution	BWE, Video
Bug	11628	DataChannel.close() will not send close signal if no data has been sent on the connection	DataChannel
Bug	11555	VP9 444 decoding broken on Windows with hardware acceleration enabled.	HardwareCodec, Video
Bug	11648	Mutex: Switch Mac mutex over from fairshare to default policy.	Internals
Bug	11600	Reduce memory consumed by RateStatistics	Internals
Bug	11572	Some rtc::Thread implementations or instances not registered as the current TaskQueue	Internals
Bug	11598	A process thread instances is allocated per-peerconnection, but could be shared.	Internals
Bug	11698	h264 stap-a-to-annex-b loop over-read	Internals
Bug	11694	Disable sctp asconf and auth extensions	Network
Bug	11597	don’t resolve dns hostnames in ice candidates when iceTransportPolicy is set to relay	Network>ICE
Bug	11617	Add trace of enqueued and sent RTP packets	Network>RTP
Bug	11691	Add support for two-byte RTP header extensions to rtp_util.cc	Network>RTP
Bug	8787	Stats: dataChannelIdentifier misspelled as "datachannelid"	Stats
Bug	9547	getstats results for simulcast are wrong and don't split up per ssrc	Stats, Video
Bug	11553	[ResourceAdaptation] Adapt up should require all limited resources to signal underuse before going up.	Video
Bug	11525	[ResourceAdaptation] Define Resource interfaces for external implementation	Video
Bug	11525	[ResourceAdaptation] Define Resource interfaces for external implementation	Video
Bug	11618	[Adaptation] Move UsageState() to ResourceListener callback and Processor	Video
Bug	11616	Add logging to improve ability to debug adaptation logic	Video
Bug	11575	Software fallback should trigger on too many errors	Video
Bug	11652	When SVC vp9 is used with non-standard resolution and adaptation down happens, video is not working	Video

[Philipp Hancke]

also note that Chrome M85 comes with a boringssl that is a bit stricter about what certificates it accepts for DTLS. See

  https://bugs.chromium.org/p/webrtc/issues/detail?id=11817

(among others) for more information.

This is easy to observe in wireshark.

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