Add live score overlay to video stream using shared volume between transcoder and overlay service

squashkiwi-streaming/config/docker-compose.yml

@@ -37,23 +37,15 @@ services:
       timeout: 10s
       retries: 3
 
-  # FFmpeg transcoder for H265 to H264
+  # FFmpeg transcoder for H265 to H264 with score overlay
   transcoder:
-    image: linuxserver/ffmpeg:latest
+    build: ./transcoder
+    image: ${PROJECT_NAME}-transcoder:latest
     container_name: ${PROJECT_NAME}-transcoder
     restart: unless-stopped
     network_mode: host
-    command: >
-      -re
-      -rtsp_transport tcp
-      -i rtsp://localhost:8554/court
-      -c:v libx264
-      -preset ultrafast
-      -tune zerolatency
-      -b:v 2M
-      -f rtsp
-      -rtsp_transport tcp
-      rtsp://localhost:8554/court_h264
+    volumes:
+      - score-data:/tmp:rw
     depends_on:
       - mediamtx
 
@@ -67,6 +59,7 @@ services:
       - mediamtx
     volumes:
       - ${RECORDINGS_FOLDER}:/recordings
+      - score-data:/tmp:rw
     environment:
       - SQUASHKIWI_API=${SQUASHKIWI_API}
       - COURT_ID=${COURT_ID}
@@ -146,6 +139,7 @@ volumes:
   nginx-cache:
   prometheus-data:
   grafana-data:
+  score-data:
 
 networks:
   default:

squashkiwi-streaming/config/transcoder/Dockerfile

@@ -0,0 +1,13 @@
+FROM linuxserver/ffmpeg:latest
+
+# Install fonts for text overlay
+RUN apk add --no-cache ttf-dejavu
+
+# Copy transcoder script
+COPY transcoder.sh /transcoder.sh
+RUN chmod +x /transcoder.sh
+
+# Create score file directory
+RUN mkdir -p /tmp
+
+ENTRYPOINT ["/transcoder.sh"]

squashkiwi-streaming/config/transcoder/transcoder.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Transcoder with live score overlay for SquashKiwi streaming
+
+# Create initial score file if it doesn't exist
+SCORE_FILE="/tmp/score.txt"
+if [ ! -f "$SCORE_FILE" ]; then
+    echo "Waiting for match..." > "$SCORE_FILE"
+fi
+
+# Start ffmpeg with drawtext filter for score overlay
+exec ffmpeg \
+    -re \
+    -rtsp_transport tcp \
+    -i rtsp://localhost:8554/court \
+    -vf "drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:\
+textfile='$SCORE_FILE':\
+reload=1:\
+fontcolor=white:\
+fontsize=24:\
+box=1:\
+boxcolor=black@0.7:\
+boxborderw=5:\
+x=10:\
+y=10" \
+    -c:v libx264 \
+    -preset ultrafast \
+    -tune zerolatency \
+    -b:v 2M \
+    -f rtsp \
+    -rtsp_transport tcp \
+    rtsp://localhost:8554/court_h264