Chrome M38 WebRTC release notes.

[Vikas Marwaha]

Hi,

Please find below Chrome 38 WebRTC release notes.- 

Features (Chrome Specific) :-

• Issue 395614:- Added support for WebRTC connection to work under NTLM/Kerberos using the default credential without prompting the user.

• Issue 3282:- Added support for RTCOfferOptions for CreateOffer API. Constraints are still supported for CreateOffer but converted to RTCOfferOptions internally.

• Added support for wider range of sample rates. Specifically support for 24Khz audio sample rate has been added.

• Improved support for audio ducking on Windows (communication device).

Features (WebRTC Platform) :-

• Issue 2204:- Added support for encoding and decoding of TCP candidates as per RFC 6544.

• Issue 2419:- Added support for Opus built in Forward Error Correction (FEC). Use 'useinbandfec=1' as Opus parameter in SDP to activate it. AppRTC demo adds such SDP by default for both desktop and mobile unless one puts 'opusfec=false' in the URL.

• Issue 3131:-  Optimized AEC for NEON, now we have better performance on ARMv7 NEON.

• Issue 3211:- Enable SCTP compile on iOS.

• Issue 1750:- Added support for 1080p video resolution with WebRTC. Now it's possible to encode and decode 1080p stream.

• Issue 3310:- Added support for multiple STUN servers in peerConnection.

Bugs (Chrome Specific):-

• Issue 381698:-  Fixed problem in getUserMedia, 2 calls to getUserMedia with different frame-rate constraints was returning same streams.

• issue 410258 :- Reduced chances of audio glitches with WebRTC on Mac.

• Issue 3601:- Fixed problem, enabling TURN/TLS to work through proxies when DNS is blocked.

• Fixed issue with audio streams causing memory leak in CoreAudio on Mac. 

• Fixed issue with getUserMedia failing due to "Invalid State.

Bugs (WebRTC Platform):-

• Issue 1775:-  Fixed issue with ICE Role Conflict handling. Now we Re-evaluate the ICE role on ICE restart.

• Issue 3232:- Fixed problem, where relay candidates obtained from different TURN servers had same foundation and priority.

• Issue 1943:- Fixed problem with endless onicecandidate callback loop when no network interface is detected.

• Issue 2260:- Fixed issue in sdp generated by chrome. As per RFC 4566, the b-lines should appear before a-lines which was not the case earlier.

• Issue 2395:-  Fixed problem, where we were not maintaining the order of m-lines in CreateOffer and CreateAnswer. Now the order in the offer follows the order in SetLocalDescription and the order in the answer follows the order in current offer.

• Issue 2628:- Fixed problem with addStream callback, which was not getting triggered for streams marked as a=sendonly.

• Issue 2868:- Fixed issue, now when creating answer, we take the codec preference from offer as per RFC 3264.

• Issue 3429:-  Limited the SCTP send and receive buffer by bytes not packets. The new limit is 16MB for each buffer.

• Issue 3491:- Fixed issue with remote candidates pushed down too early during renegotiation.

• Issue 39112:- Fixed issue in VP8 denoiser, it was generating artifacts at low bit rates. 

Known issue:-

• Issue 3964:- Data channel only peerconnection triggers an onAddStream callback.

/Vikas

[Vikas]

A M38 change i had missed, thanks to Philipp Hancke for bringing it up.

• issue 387632 :- Changed SdpSerializeCandidate to output candidate line without the "a=" and without the leading \r\n", i.e. candidate-attribute as defined in section 15. of [ICE].

/Vikas