fix(ci): stabilize live release validation

.github/workflows/openclaw-live-and-e2e-checks-reusable.yml

@@ -1364,6 +1364,17 @@ jobs:
       - name: Hydrate live auth/profile inputs
         run: bash scripts/ci-hydrate-live-auth.sh
 
+      - name: Install live media dependencies
+        if: matrix.suite_id == 'live-all'
+        shell: bash
+        run: |
+          set -euo pipefail
+          if ! command -v ffmpeg >/dev/null 2>&1; then
+            sudo apt-get update
+            sudo DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends ffmpeg
+          fi
+          ffmpeg -version | head -1
+
       - name: Configure suite-specific env
         shell: bash
         run: |