【ai】livekit服务本地开发模式及example app信令交互详细流程

文档要安装git lfs
下载当前最新版本1.6.1

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windows版本：启动dev模式

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服务器启动

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(.venv) PS D:\XTRANS\pythonProject\LIVEKIT> cd .\livekit_release\
(.venv) PS D:\XTRANS\pythonProject\LIVEKIT\livekit_release> ls


    Directory: D:\XTRANS\pythonProject\LIVEKIT\livekit_release


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----         5/29/2024     11:20       21477249 livekit-cli_1.4.3_windows_amd64.zip
-a----         4/27/2024     03:11       29753856 livekit-server.exe
-a----         5/29/2024     11:17       10440081 livekit_1.6.1_windows_amd64.zip


(.venv) PS D:\XTRANS\pythonProject\LIVEKIT\livekit_release> .\livekit-server.exe -dev        
2024-05-29T11:29:40.070+0800    INFO    livekit server/main.go:208      starting in development mode
2024-05-29T11:29:40.071+0800    INFO    livekit server/main.go:211      no keys provided, using placeholder keys        {"API Key": "devkey", "API Secret": "secret"}
2024-05-29T11:29:40.071+0800    ERROR   livekit hwstats/cpu_null.go:37  CPU monitoring unsupported on current platform. Server capacity management will be disabled
github.com/livekit/protocol/utils/hwstats.newPlatformCPUMonitor
        /home/runner/go/pkg/mod/github.com/livekit/protocol@v1.14.1-0.20240426104403-e7962f444464/utils/hwstats/cpu_null.go:37
github.com/livekit/protocol/utils/hwstats.NewCPUStats
        /home/runner/go/pkg/mod/github.com/livekit/protocol@v1.14.1-0.20240426104403-e7962f444464/utils/hwstats/cpu.go:46
github.com/livekit/livekit-server/pkg/telemetry/prometheus.Init
        /home/runner/go/pkg/mod/github.com/livekit/livekit-server@v1.6.1/pkg/telemetry/prometheus/node.go:119
main.startServer
        /home/runner/go/pkg/mod/github.com/livekit/livekit-server@v1.6.1/cmd/server/main.go:275
github.com/urfave/cli/v2.(*Command).Run
        /home/runner/go/pkg/mod/github.com/urfave/cli/v2@v2.27.1/command.go:279
github.com/urfave/cli/v2.(*App).RunContext
        /home/runner/go/pkg/mod/github.com/urfave/cli/v2@v2.27.1/app.go:337
github.com/urfave/cli/v2.(*App).Run
        /home/runner/go/pkg/mod/github.com/urfave/cli/v2@v2.27.1/app.go:311
main.main
        /home/runner/go/pkg/mod/github.com/livekit/livekit-server@v1.6.1/cmd/server/main.go:185
runtime.main
        /opt/hostedtoolcache/go/1.22.2/x64/src/runtime/proc.go:271
2024-05-29T11:29:40.072+0800    INFO    livekit routing/interfaces.go:110       using single-node routing
2024-05-29T11:29:40.128+0800    INFO    livekit service/server.go:243   starting LiveKit server {"portHttp": 7880, "nodeID": "ND_5fUotUdPwB5P", "nodeIP": "169.254.25.153", "version": "1.6.1", "bindAddresses": ["127.0.0.1", "::1"], "rtc.portTCP": 7881, "rtc.portUDP": {"Start":7882,"End":0}}
2024-05-29T11:29:40.129+0800    INFO    livekit service/server.go:245   Windows detected, capacity management is unavailable
2024-05-29T11:29:40.129+0800    DEBUG   livekit service/signal.go:122   starting relay signal server    {"topic": "ND_5fUotUdPwB5P"}

命令行配置工具启动并创建

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(.venv) PS D:\XTRANS\pythonProject\LIVEKIT\livekit_release> .\livekit-cli.exe create-token   --api-key devkey --api-secret secret  --join --room my-first-room --identity user1 --valid-for 24h
valid for (mins):  1440
token grants
{
  "roomJoin": true,
  "room": "my-first-room"
}

access token:  eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MTcwNDAyNTUsImlzcyI6ImRldmtleSIsIm5hbWUiOiJ1c2VyMSIsIm5iZiI6MTcxNjk1Mzg1NSwic3ViIjoidXNlcjEiLCJ2aWRlbyI6eyJyb29tIjoibXktZmlyc3Qtcm9vbSIsInJvb21Kb2luIjp0cnVlfX0.7Dp4eEO6PL-wgfohVYpk5PikMe-ANTnVzz9FCxwxQqA
(.venv) PS D:\XTRANS\pythonProject\LIVEKIT\livekit_release>

有example app 做测试

test with example app
输入一个访问token：

access token:  eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MTcwNDAyNTUsImlzcyI6ImRldmtleSIsIm5hbWUiOiJ1c2VyMSIsIm5iZiI6MTcxNjk1Mzg1NSwic3ViIjoidXNlcjEiLCJ2aWRlbyI6eyJyb29tIjoibXktZmlyc3Qtcm9vbSIsInJvb21Kb2luIjp0cnVlfX0.7Dp4eEO6PL-wgfohVYpk5PikMe-ANTnVzz9FCxwxQqA

然后connect 到自己的服务器。

Head over to our example app and enter a generated token to connect to your LiveKit server. This app is built with our React SDK.
Once connected, your video and audio are now being published to your new LiveKit instance!

服务器的地址填啥啊：

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wss://127.0.0.1:7880

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测试服务只有http端口：ws://127.0.0.1:7880

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连接成功

connecting to ws://127.0.0.1:7880/rtc?access_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MTcwNDAyNTUsImlzcyI6ImRldmtleSIsIm5hbWUiOiJ1c2VyMSIsIm5iZiI6MTcxNjk1Mzg1NSwic3ViIjoidXNlcjEiLCJ2aWRlbyI6eyJyb29tIjoibXktZmlyc3Qtcm9vbSIsInJvb21Kb2luIjp0cnVlfX0.7Dp4eEO6PL-wgfohVYpk5PikMe-ANTnVzz9FCxwxQqA&auto_subscribe=1&sdk=js&version=2.1.5&protocol=13&adaptive_stream=1

ping

连接到livkit服务

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房间

音频track

-

视频track

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屏幕共享

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收到了服务端发来的offer

"v=0
o=- 3539670089777133376 1716954452 IN IP4 0.0.0.0
s=-
t=0 0
a=msid-semantic:WMS*
a=fingerprint:sha-256 45:14:D4:79:B6:18:BA:9B:34:F1:CF:DA:66:AA:EA:07:83:5B:A3:5A:C5:46:47:D8:94:DB:26:F5:CD:B7:4C:E3
a=extmap-allow-mixed
a=group:BUNDLE 0
m=application 9 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 0.0.0.0
a=setup:actpass
a=mid:0
a=sendrecv
a=sctp-port:5000
a=ice-ufrag:gSTaoeYEXVclkirW
a=ice-pwd:eiWMcXuxMaLrXfPGjLYwBvZwejtSHAZE
"

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设置本地SDP

发送answer

"v=0
o=- 8490693211729429077 2 IN IP4 127.0.0.1
s=-
t=0 0
a=extmap-allow-mixed
a=msid-semantic:  WMS
a=group:BUNDLE 0
m=application 9 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 0.0.0.0
a=setup:active
a=mid:0
a=ice-ufrag:+brm
a=ice-pwd:g3FGDMFwFFY2tLEzG3v+WKOh
a=fingerprint:sha-256 37:9B:7C:99:8D:13:69:06:B5:D5:66:C0:67:3E:C0:BC:21:B3:A7:68:7C:B1:03:E5:8C:24:C0:52:06:B9:F7:28
a=ice-options:trickle
a=sctp-port:5000
"

pc状态改变：从new 到连接ing

主要pc状态改变

pc状态从connecting到connectd

主要pc状态改变2

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更新track的订阅权限

datachannel1 ： reliable

datachanel3 ： lossy

room event ：状态改变为connected

发布一个track publishing track

收到了track发布应答 received trackPublishedResponse

更新发布信息、track信息

发布音频：携带编码信息

开始协商

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开始 munged 本地描述

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发送offer

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"v=0
o=- 8396030922318899904 2 IN IP4 127.0.0.1
s=-
t=0 0
a=extmap-allow-mixed
a=msid-semantic: WMS 8d171c18-977d-4ba2-b592-97e1a7f62532
a=group:BUNDLE 0 1
m=audio 9 UDP/TLS/RTP/SAVPF 111 63 9 0 8 13 110 126
c=IN IP4 0.0.0.0
a=rtpmap:111 opus/48000/2
a=rtpmap:63 red/48000/2
a=rtpmap:9 G722/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:13 CN/8000
a=rtpmap:110 telephone-event/48000
a=rtpmap:126 telephone-event/8000
a=fmtp:111 minptime=10;useinbandfec=1
a=fmtp:63 111/111
a=rtcp:9 IN IP4 0.0.0.0
a=rtcp-fb:111 transport-cc
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid
a=setup:actpass
a=mid:0
a=msid:8d171c18-977d-4ba2-b592-97e1a7f62532 6626e558-44bc-4a1a-a364-173503f39c02
a=sendonly
a=ice-ufrag:Os7Y
a=ice-pwd:uh13Zyrm3ScOX1g1/OpRacbx
a=fingerprint:sha-256 DA:09:84:61:32:BA:B7:99:54:2D:1D:B5:F6:F0:DE:10:45:2F:66:0B:D2:6B:F6:B7:B4:62:7C:19:17:DC:D6:74
a=ice-options:trickle
a=ssrc:3723991868 cname:5f/brAKhc+jUMDn7
a=ssrc:3723991868 msid:8d171c18-977d-4ba2-b592-97e1a7f62532 6626e558-44bc-4a1a-a364-173503f39c02
a=rtcp-mux
m=application 9 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 0.0.0.0
a=setup:actpass
a=mid:1
a=ice-ufrag:Os7Y
a=ice-pwd:uh13Zyrm3ScOX1g1/OpRacbx
a=fingerprint:sha-256 DA:09:84:61:32:BA:B7:99:54:2D:1D:B5:F6:F0:DE:10:45:2F:66:0B:D2:6B:F6:B7:B4:62:7C:19:17:DC:D6:74
a=ice-options:trickle
a=sctp-port:5000
a=max-message-size:262144
"

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