Release Pion WebRTC v3.2.0

[Sean-Der]

It has been a long time since we have made a minor release (September). I think now is a good time to make another one! This minor release will be no different then patch releases for users. I just see this as an opportunity to apply some polish to Pion. When we are done is also a good time to announce all the great work everyone has been doing.

Here are the things I would like to do before tagging a v3.2.0

Audit and Close issues
I would like to take this chance to close out as many issues as possible. Or at least audit all the issues that would require breaking changes. I will start making that list here today.

• Add ORTC Media examples #379
• No assertion is thrown when remote SessionDescription doesn't satisfy local #785
• Fix data-channels-flow-control example #846
• Detach doesn't work as expected #903
• Assert that OnICEConnectionStateChange doesn't incorrectly report disconnected #1002
• improve samplebuilder docs #1242
• Writing to a detached datachannel doesn't error when it disconnects #1284
• Error: Outbound packet larger than maximum message size 65535 #1396
• Update docs to suggest other libraries for reading/writing media to disk #1440
• the connected RTCPeerConnection addTransceiver() trigger onnegotiationneeded . after negotiation,new track donot play. #1512
• race when simulcast #1803
• Support play PCM16L from disk #1830
• AddTransceiverFromTrack and AddTrack don't set the codec preferences #1909
• UDPMux causes massive packet loss ice#518
• no ssrc-group:FID in sdp text #1989
• Decoding Audio Track #1996
• add drawio files for examples #1998
• webrtc client is not sending stun message to keepalive then ice got disconnect #2061
• Take direction into account when parsing RTP extensions #2062
• Video track slow response and potential frame loss #2085
• Consolidate setting up streams for RTPReceiver #2088
• Opus audio is not received completely #2090
• DataChannel.readLoop goroutine leak #2098
• OnTrack will not be fired on Simulcast #2103
• Cannot add a candidate without specifying either sdpMid or sdpMLineIndex - Webrtc Wasm #2121
• IceCandidate Error on Firefox browser #2157
• "valid" unified plan sdp considered as planB by pion #2193
• Remove the "Unknown" constants #1929
• Local rtcp-fb values are used when answering #1968
• add drawio diagram for examples #1999

Bring Congestion Control to a Usable State
I don't know how to define this. Maybe we are already done? @mengelbart @kevmo314 what do you think? More examples, features or bug fixing needed?

Write Release Notes
What are the high level features that everyone is excited about? Are they in a good state for people to start using?

• AV1 Support
• Congestion Control
• Send-side Simulcast
• ?

What else
What else do people think would make a compelling release? @davidzhao @kevmo314 @adriancable @wdouglass @jech @at-wat @boushley @enobufs @mengelbart @cnderrauber @jselbie @iamcalledrob @boks1971 @AndyEsser. If I missed someone please add them! These are people who have been active on GitHub/Slack

[kevmo314]

Does the GCC congestion controller support RFC8888? I think it would be good to have that in so we standardize on a congestion control format. It's not so easy to change later if we want to maintain backwards compatibility.

[mengelbart]

Congestion Control currently does not work with RFC 8888. We have pion/interceptor#112 for adding an RFC 8888 interceptor to generate feedback, but that currently does not perform as good as another implementation and I would like to improve that before merging that. Once that is done, we can add support to the congestion controller as well. I agree that it would be nice to have that done before the release, but I am not sure if it would really be that hard to add support for RFC 8888 later since the congestion controller can just continue to work with whatever feedback it receives.

I would also like to finish some more tests for BWE, so we can actually point to some plots that show how it behaves in different network conditions. I think I have done most of what we need for that before, but I have to put it all together in one repository. I already started https://github.com/pion/bwe-test a while ago for that, just didn't get to add all tests and visualizations yet.

[jech]

I think that #1803 is fairly important, it regularly appears in my race detector logs.

What about #1675? This causes real issues with non-browser clients.

I'm also taking the opportunity to point at my todo list: jech/galene#14. There's a lot of overlap with Sean's, fortunately.

[mohammadne]

Hi, I would like to know #1998 can be merged for this release?

[Sean-Der]

Pion WebRTC 3.2.0 was released. Currently working on v4