v1.9.1

Fixed

• swap pub/sub track metrics (#3717)
• Fix bug with SDP rid, clear only overflow. (#3723)
• Don't check bindState on downtrack.Bind (#3726)
• Return highest available layer if requested quality is higher than max (#3729)
• Fix data packet ParticipantIdentity override logic in participant.go (#3735)
• Fix svc encoding for chrome mobile on iOS (#3751)
• offer could be nil when migrating. (#3752)
• fix(deps): update module github.com/livekit/protocol to v1.39.3 (#3733)
• bounds check layer index (#3768)
• Do not send leave if nil (to older clients) (#3817)
• Fix: RingingTimeout was being skipped for transferParticipant (#3831)
• Handle no codecs in track info (#3859)
• Fix missed unlock (#3861)
• Fix timeout handing in StopEgress (#3876)
• fix: ensure the participant kind is set on refresh tokens (#3881)
• Do not advertise NACK for RED. (#3889)
• Do not send both asb-send-time and twcc. (#3890)
• Prevent race in determining BWE type. (#3891)

Added

• Adds Devin to readme so it auto updates DeepWiki weekly (#3699)
• Allow passing extra attributes to RTC endpoint. (#3693)
• warn about credentials when used in tokens (#3705)
• protocol dep for webhook stats buckets (#3706)
• for real, pick up protocol change for webhooks queue length buckets (#3707)
• implement observability for room metrics (#3712)
• e2e reliability for data channel (#3716)
• Add simulcast support for WHIP. (#3719)
• Add Id to SDP signalling messages. (#3722)
• Set and use rid/spatial layer in TrackInfo. (#3724)
• Add log for dropping out of order reliable message (#3728)
• chore: set workerid on job creation (#3737)
• return error when moving egress/agent participant (#3741)
• SVC with RID -> spatial layer mapping (#3754)
• feat(cli-flags): add option for cpu profiling (#3765)
• Enable H265 by default (#3773)
• Signalling V2 protocol implementation start (#3794)
• Signal v2: envelope and fragments as wire message format. (#3800)
• Grouping all signal messages into participant_signal. (#3801)
• starting signaller interface (#3802)
• Signal handling interfaces and participant specific HTTP PATCH. (#3804)
• Split signal segmenter and reassembler. (#3805)
• Filling out messages unlikely to change in v2. (#3806)
• Use signalling utils from protocol (#3807)
• Validation end point for v2 signalling. (#3811)
• More v2 signalling changes (#3814)
• Minor tweak to keep RPC type at service level. (#3815)
• Add country label to edge prom stats. (#3816)
• HTTP DELETE of participant session (#3819)
• Get to the point of establishing subscriber peer connection. (#3821)
• Get to the point of connecting publisher PC and using it for async signalling (#3822)
• Support join request as proto + base64 encoded query param (#3836)
• Use wrapped join request to be able to support compressed and uncompressed. (#3838)
• handle SyncState in join request (#3839)
• Support per simulcast codec layers. (#3840)
• Support video layer mode from client and make most of the code mime aware (#3843)
• Send participant_connection_aborted when participant session is closed (#3848)
• Support G.711 A-law and U-law (#3849)
• Extract video size from media stream (#3856)
• update mediatransport util for ice port 3478 (#3877)
• Single peer connection mode (#3873)
• handle frame number wrap back in svc (#3885)
• Use departure timeout from room preset. (#3888)
• Use RequestResponse to report protocol handling errors (#3895)

Changed

• Add a trend check before declaring joint queuing region. (#3701)
• Small changes to add/use helper functions for length checks. (#3704)
• remove unused ws signal read loop (#3709)
• Flush stats on close (#3713)
• Do not require create permission for WHIP participant. (#3715)
• Create client config manager in room manager constructor. (#3718)
• Clear rids from default for layers not published. (#3721)
• Clear rids if not present in SDP. (#3731)
• Revert clearing RIDs. (#3732)
• Take ClientInfo from request. (#3738)
• remove unused code (#3740)
• reuse compiled client config scripts (#3743)
• feat(cli): update to urfave/cli/v3 (#3745)
• move egress roomID load to launcher (#3748)
• Log previous allocation to see changes. (#3759)
• Do not need to just clean up receivers. Remove that interface. (#3760)
• ClearAllReceivers interface is used to pause relay tracks. (#3761)
• Temporary change: use pre-defined rids (#3767)
• Revert "Temporary change: use pre-defined rids" (#3769)
• Log SDP rids to understand the mapping better. (#3770)
• Limit taking rids from SDP only in WHIP path. (#3771)
• Set rids for all codecs. (#3772)
• Return default layer for invalid rid + track info combination. (#3778)
• Normalize known rids. (#3779)
• forward agent id to job state (3786)
• Map ErrNoResponse to ErrRequestTimedOut in StopEgress to avoid returning 503 (#3788)
• Set participant active when peerconnection connected (#3790)
• Handle Metadata field from RoomConfig (#3798)
• [🤖 readme-manager] Update README (#3808)
• [🤖 readme-manager] Update README (#3809)
• Rename RTCRest -> WHIP (#3829)
• Delete v2 signalling (#3835)
• Clean up missed v2 pieces (#3837)
• Update go deps (#3849)
• Populate SDP cid in track info when available. (#3845)
• Log signal messages as debug. (#3851)
• Log signal messages on media node. (#3852)
• Log track settings more. (#3853)
• Update pion deps (#3863)
• Update golang Docker tag to v1.25 (#3864)
• Update module github.com/livekit/protocol to v1.40.0 (#3865)
• Remove unnecessary check (#3870)
• chunk room updates (#3880)
• Switch known rids from 012 -> 210, used by OBS. (#3882)
• init ua parser once (#3883)
• Revert to using answer for migration case. (#3884)
• Handle migration better in single peer connection case. (#3886)