PSA: WebRTC M88 Release Notes

[Huib Kleinhout]

WebRTC M88 Release Notes

WebRTC 4324 branch (cut at daab6896e2938e28f01e305ce2fff038f47554c4)

Summary

WebRTC M88 currently available in Chrome's beta channel, contains over 29 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.

Features

Optimized video capture using NV12 VideoFrame

Both VP8 and VP9 libvpx wrappers now support encoding NV12 video frames. Video sources that emit NV12 video frames can thus be encoded directly without requiring conversion to I420. Chrome is making use of this by avoiding unnecessary conversions when NV12 frames can be encoded.

Deprecations

RTP Datachannels are going away

As of M88, use of RTP datachannels will cause a deprecation warning. We expect to remove them altogether in M90. Use SCTP-based datachannels instead. More info in the PSA.

Platform	Issue	Description	Component
webrtc	12054	Deprecate and remove GetRemoteAudioSSLCertificate

Features and Bugfixes

Type	Issue	Description	Component
Bug	1111273	MSE freezes and comes to life after 30 minutes	Blink>Media,Internals>Media>Hardware,Internals>Media>Video
Bug	1132299	[macOS Capture] Implement efficient scaling/conversion with VTPixelTransferSession and libyuv-into-IOSurface	Internals>Media>Capture
Bug	1134686	Possible regression in webrtc createOffer, sometimes fails with warning about unknown transceiver when didn't before	Blink>WebRTC
Bug	1137936	Possible deadlock when handling SCTP restart	Blink>WebRTC>PeerConnection
Bug	1139052	"Failed to demux RTP packet" errors with two video tracks on M86	Blink>WebRTC>PeerConnection
Bug	1142626	webrtc stats audioLevel incorrect on inbound-rtp	Blink>WebRTC>PeerConnection
Bug	10155	Excessive video delay with pacing factor 1.0	Video
Bug	10232	The AEC3 transparency is poor initially in the call when headsets are used	Audio
Bug	10676	Implement early loss detection using transport feedback	Network>RTP
Bug	11622	NetEq statistics are reset when new getStats() is called	Audio
Feature	11635	Reduce frame copies in libvpx	Video
Bug	11643	opus speech detection ignores SILK vad results	Audio
Feature	11769	Add new parameter for H.264	Video
Bug	11974	Add NV12 Support for VP9	Video
Bug	11975	Add NV12 Support for VP8	Video
Feature	11976	Avoid converting VideoFrameBuffers to I420 before passing them into a VideoEncoder	Video
Bug	11977	NV12 frames held by kNative VideoFrameBuffers can be accessed	Video
Bug	11995	Split SDP offer/answer handling from the rest of PeerConnection	Blink>WebRTC>PeerConnection
Bug	1200	audio is broken on android since r3226	Audio
Bug	12026	VideoStreamTest.ResolutionAdaptsToAvailableBandwidth is flaky	Video
Bug	12035	Get rid of memory allocations in webrtc::AudioMixerImpl::GetAudioFromSources()	Audio
Bug	12036	Get rid of memory allocation in webrtc::AudioMixerImpl::CalculateOutputFrequency()	Audio
Bug	12051	Fix logging in desktop_capture module on Windows	DesktopCapture
Bug	12102	Sort out webrtc usage of reader-writer locks	Internals
Bug	12121	Enable continuous audio polling from ADM after StopPlay in VoIP API	Audio
Bug	3513	SDP parsing: malformed m-lines are ignored	PeerConnection
Feature	6762	Include packet overhead in BWE	BWE
Bug	1140452	AEC3: New transparent mode classifier can cause low level echo leakage	Blink>WebRTC>Audio
Bug	12054	Deprecate and remove GetRemoteAudioSSLCertificate	PeerConnection

[Philipp Hancke]

Is there a reason it takes four weeks to generate the release notes after the branch cut?

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