diff --git a/video_worker/center_dispatch/.env.example b/video_worker/center_dispatch/.env.example
index 49b448f..d53c0c4 100644
--- a/video_worker/center_dispatch/.env.example
+++ b/video_worker/center_dispatch/.env.example
@@ -7,7 +7,7 @@ APT_MIRROR=mirrors.aliyun.com
 PIP_INDEX_URL=https://mirrors.aliyun.com/pypi/simple/
 PIP_TRUSTED_HOST=mirrors.aliyun.com
 
-AUTO_PULL_LATEST=true
+AUTO_PULL_LATEST=false
 GIT_REPO_URL=
 GIT_BRANCH=master
 GIT_CLONE_DEPTH=1
diff --git a/video_worker/center_dispatch/scripts/start.sh b/video_worker/center_dispatch/scripts/start.sh
index f9f4b54..002a8bc 100644
--- a/video_worker/center_dispatch/scripts/start.sh
+++ b/video_worker/center_dispatch/scripts/start.sh
@@ -22,6 +22,27 @@ fi
 PORT=$(grep '^EDGE_DISPATCH_PORT=' .env | tail -n1 | cut -d'=' -f2- || true)
 PORT="${PORT:-8060}"
 
+# AUTO_PULL_LATEST=true requires GIT_REPO_URL. If empty, fallback to local source build.
+AUTO_PULL="$(grep '^AUTO_PULL_LATEST=' .env | tail -n1 | cut -d'=' -f2- || true)"
+AUTO_PULL="${AUTO_PULL:-true}"
+GIT_REPO_URL_VAL="$(grep '^GIT_REPO_URL=' .env | tail -n1 | cut -d'=' -f2- || true)"
+
+if [ "$AUTO_PULL" = "true" ] && [ -z "$GIT_REPO_URL_VAL" ]; then
+  if [ -d "${ROOT_DIR}/.git" ]; then
+    REPO_FROM_GIT="$(git -C "$ROOT_DIR" config --get remote.origin.url || true)"
+  else
+    REPO_FROM_GIT=""
+  fi
+
+  if [ -n "$REPO_FROM_GIT" ]; then
+    echo "[WARN] GIT_REPO_URL empty; use git remote origin: $REPO_FROM_GIT"
+    export GIT_REPO_URL="$REPO_FROM_GIT"
+  else
+    echo "[WARN] GIT_REPO_URL empty; fallback AUTO_PULL_LATEST=false (build from local source)"
+    export AUTO_PULL_LATEST=false
+  fi
+fi
+
 docker compose up -d --build
 echo "[OK] center dispatch started"
 echo "[INFO] health: curl http://127.0.0.1:${PORT}/health"