Mantiene la copertina YouTube se il telefono cade e avvia ffmpeg sul nodo, non via SSH.

Il relay HLS→RTMPS resta sul worker/agent del nodo assegnato, così tre dirette contemporanee restano in onda sul sito e sul canale della società senza schermo nero.

Co-authored-by: Cursor <cursoragent@cursor.com>

infra/stream-node/cloud-init.yaml

@@ -1,5 +1,5 @@
 #cloud-config
-# Nodo stream Hetzner: MediaMTX + ffmpeg.
+# Nodo stream Hetzner: MediaMTX + ffmpeg + relay-agent (YouTube sul nodo).
 # HCLOUD_USER_DATA_FILE=.../infra/stream-node/cloud-init.yaml
 
 package_update: true
@@ -8,14 +8,14 @@ packages:
   - ffmpeg
   - curl
   - apparmor
+  - python3
+  - fonts-dejavu-core
 
 write_files:
   - path: /opt/stream-node/mediamtx.yml
     permissions: "0644"
     content: |
       logLevel: info
-      # Allinea a infra/mediamtx.yml: API raggiungibile anche da IP non-localhost
-      # (in prod restringere via WireGuard / firewall Hetzner).
       authInternalUsers:
         - user: any
           pass:
@@ -34,34 +34,61 @@ write_files:
       hlsAddress: :8888
       paths:
         all_others:
+  - path: /opt/stream-node/relay-agent.service
+    permissions: "0644"
+    content: |
+      [Unit]
+      Description=Match Live TV YouTube relay agent
+      After=network-online.target docker.service
+      Wants=network-online.target
+      [Service]
+      Type=simple
+      EnvironmentFile=-/opt/stream-node/agent.env
+      ExecStart=/usr/bin/python3 /opt/stream-node/relay-agent.py
+      Restart=always
+      RestartSec=2
+      [Install]
+      WantedBy=multi-user.target
+  - path: /opt/stream-node/agent.env
+    permissions: "0600"
+    content: |
+      STREAM_NODE_AGENT_SECRET=mediamtx_webhook_dev_secret
+      STREAM_NODE_AGENT_LISTEN=0.0.0.0:9100
+      STREAM_NODE_LOCAL_HLS_URL=http://127.0.0.1:8888
+      STREAM_NODE_RELAY_LOG_DIR=/var/log
   - path: /opt/stream-node/bootstrap.sh
     permissions: "0755"
     content: |
       #!/bin/bash
       set -euo pipefail
-      mkdir -p /recordings /slates
+      mkdir -p /recordings /slates /var/log
       systemctl enable --now docker
-      # aspetta il socket docker
       for i in $(seq 1 60); do
         if docker info >/dev/null 2>&1; then break; fi
         sleep 2
       done
       docker pull bluenviron/mediamtx:latest
       docker rm -f mediamtx 2>/dev/null || true
-      # Slate offline (alwaysAvailable) — richiesta da Mediamtx::Client#create_path.
-      # MediaMTX 1.20+: AAC del publisher RTMP deve matchare la slate.
-      # Allineato ad app Android (BroadcastConfig: 48 kHz mono) e infra/scripts/generate_slate.sh.
-      mkdir -p /slates
-      ffmpeg -y -f lavfi -i color=c=black:s=1280x720:d=2 -f lavfi -i anullsrc=r=48000:cl=mono \
-        -c:v libx264 -t 2 -pix_fmt yuv420p -c:a aac -ac 1 -ar 48000 -shortest /slates/offline.mp4
-      # Debian cloud image: docker.io senza apparmor_parser → serve unconfined o pkg apparmor
+      FONT=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf
+      # Copertina alwaysAvailable (NON nera): resta in HLS/YouTube se l'app cade.
+      ffmpeg -y -f lavfi -i color=c=0x0a0a0e:s=1280x720:r=30:d=30 \
+        -f lavfi -i anullsrc=r=48000:cl=mono \
+        -vf "drawtext=fontfile=${FONT}:text='Match Live TV':fontsize=64:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2-48,drawtext=fontfile=${FONT}:text='Trasmissione in pausa':fontsize=36:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2+36" \
+        -c:v libx264 -pix_fmt yuv420p -profile:v baseline -level 3.1 \
+        -x264-params "keyint=30:min-keyint=30:scenecut=0:bframes=0" \
+        -g 30 -keyint_min 30 -preset fast \
+        -c:a aac -b:a 128k -ac 1 -ar 48000 -shortest /slates/offline.mp4
       docker run -d --name mediamtx --restart unless-stopped --network host \
         --security-opt apparmor=unconfined \
         -v /opt/stream-node/mediamtx.yml:/mediamtx.yml:ro \
         -v /recordings:/recordings \
         -v /slates:/slates:ro \
         bluenviron/mediamtx:latest /mediamtx.yml
-      # smoke locale
+      if [[ -f /opt/stream-node/relay-agent.py ]]; then
+        cp /opt/stream-node/relay-agent.service /etc/systemd/system/mltv-relay-agent.service
+        systemctl daemon-reload
+        systemctl enable --now mltv-relay-agent.service
+      fi
       for i in $(seq 1 30); do
         if curl -fsS http://127.0.0.1:9997/v3/paths/list >/dev/null; then
           echo "mediamtx ready" | tee /opt/stream-node/ready