Janus の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• Janus へ行く。
• Janus の差分を削除

#author("2025-08-11T12:18:58+00:00","default:iseki","iseki")
#author("2025-08-11T12:27:11+00:00","default:iseki","iseki")
* Janus [[WebRTC]] Server 

** Build (Rocky Linux 9)
*** ツール
 dnf -y install jansson-devel libconfig-devel libmicrohttpd-devel meson ninja-build

-- [[meson]]: [[cmake]] みたいなビルド設定ツール
-- [[ninja]]: [[make]] みたいな ビルドツール

 dnf install libnice libnice-devel
 dnf install libwebsockets libwebsockets-devel
 dnf install usrsctp usrsctp-devel



**** libsrtp2 (SRTP: Secure Real-time Transport Protocol)
<pre>
#git clone https://github.com/cisco/libsrtp.git  # このままだと libsrtp3 がダウンロードされる
git clone --branch v2.5.0 --depth 1 https://github.com/cisco/libsrtp.git libsrtp
cd libsrtp
./configure --prefix=/usr/local --enable-openssl
make -j"$(nproc)"
make install
</pre>

**** 最新版
- libnice 
<pre>
git clone https://gitlab.freedesktop.org/libnice/libnice.git
cd libnice/
meson setup build --prefix=/usr/local
ninja -C build
ninja -C build install
</pre>

-libwebsocket
<pre>
git clone https://github.com/warmcat/libwebsockets.git
cd libwebsockets
mkdir -p build && cd build
cmake -DLWS_MAX_SMP=1 -DLWS_WITHOUT_EXTENSIONS=0 -DCMAKE_INSTALL_PREFIX=/usr/local ..
make -j"$(nproc)"
make install
</pre>

*** Janus
<pre>
git clone https://github.com/meetecho/janus-gateway.git
cd janus-gateway
./autogen.sh
./configure --prefix=/usr/local --enable-rest --enable-websockets --enable-data-channels --disable-rabbitmq --disable-mqtt --disable-docs --enable-libsrtp2
make -j"$(nproc)"
make install
make configs
</pre>

** 設定
*** 設定ファイル
**** /usr/local/etc/janus/janus.jcfg
 api_secret = ""        # Janus REST API 用の認証キー
 admin_secret = ""      # Janus 管理用 API の認証キー


- [[coturn]] を使用するなら，以下を追加
<pre>
nat: {
        stun_server = "janus.jogrid.net"
        stun_port = 3478
        #nice_debug = "nice_debug option is NOT SUPPORTED ANYMORE! Please set NICE_DEBUG and G_MESSAGES_DEBUG env vars when starting Janus"
        #full_trickle = true
        #ice_nomination = "regular"
        #ice_consent_freshness = true
        #ice_keepalive_conncheck = true
        #ice_lite = true
        #ice_tcp = true
</pre>
**** /usr/local/etc/janus/janus.transport.http.jcfg (デフォルト)
 http = true
 port = 8088      # for REST


**** /usr/local/etc/janus/janus.transport.websockets.jcfg (デフォルト)
 ws = true
 ws_port = 8188   # for Web Socket

**** /usr/local/etc/janus/janus.plugin.audiobridge.jcfg
<pre>
general: {
  # 必要に応じて設定（例）
  # string_ids = true
  # rtp_port_range = "50000-60000"
  # local_ip = "1.2.3.4"
  # events = true
}

room-1234: {
  description = "Demo Room"
  is_private = false
  secret = "room-secret"    # ルーム操作用パスワード
  pin = "room-pin"          # 参加時パスワード（必要なら）
  sampling_rate = 48000     # or 16000 
  spatial_audio = true
  audiolevel_ext = true
  audiolevel_event = true
  audio_active_packets = 100
  audio_level_average = 25
  record = false
  # record_dir = "/var/recordings/"
  # record_file = "room-1234.wav"
  # allow_rtp_participants = false
  # rtp_forward_* = ...     # 外部RTP転送を使う場合のみ
}
</pre>


*** Systemd

**** janus.service
<pre>
[Unit]
Description=Janus WebRTC Server
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/janus -F /usr/local/etc/janus
Restart=on-failure
User=root

[Install]
WantedBy=multi-user.target
</pre>


*** Apache で HTTPS, WSS リバースプロキシ
- [[Virtual Host の設定>Apache/Configuration-2.4/VirtualHost]]
**** 仮想ホスト設定（WSS対応）
- [[certbot]] の設定
- [[conf.d/janus.conf>Apache/Configuration-2.4/VirtualHost]]


** STUN/TURN（[[coturn]]）
*** 設定
- see [[coturn]]



** TEST
*** Janus の単体疎通テスト
**** REST (8088)
 curl http://localhost:8088/janus/info

**** WS (8188)
 printf '%s\n' '{"janus":"info","transaction":"t1"}' | websocat -H='Sec-WebSocket-Protocol: janus-protocol' - ws://127.0.0.1:8188/janus

**** WSS
 printf '%s\n' '{"janus":"info","transaction":"t1"}' | websocat --text -H='Sec-WebSocket-Protocol: janus-protocol' -  wss://janus.jogrid.net/janusws
*** Coturn の STUN/TURN 動作確認
- see [[coturn]]



*** Janus + Coturn 経由の WebRTC 動作確認


*** ICE 候補の種類を確認（ブラウザ DevTools）





** for OpenSimulator
*** OpenSim.ini
<pre>
[JanusVoice]
; …略…
IceServers = [
  {"urls":["stun:stun.l.google.com:19302"]},
  {"urls":["turn:janus.jogrid.net:3478"], "username":"＜TURNユーザ＞", "credential":"＜パス＞"},
  {"urls":["turns:janus.jogrid.net:5349"], "username":"＜TURNユーザ＞", "credential":"＜パス＞"}
]
</pre>













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