Update app.py

app.py

@@ -5,8 +5,10 @@ import os
 
 app = Flask(__name__, template_folder="templates", static_folder="static")
 
-# PRELOAD MODELS (only once at startup)
-emotion_model = DeepFace.build_model("Emotion")
+# preload emotion model once
+models_cache = {
+    "emotion": DeepFace.build_model("Emotion")
+}
 
 @app.route("/")
 def index():
@@ -15,7 +17,7 @@ def index():
 @app.route("/detect_live", methods=["POST"])
 def detect_live():
     if "frame" not in request.files:
-        return jsonify({"error": "missing frame"}), 400
+        return jsonify({"error": "no frame uploaded"}), 400
 
     file = request.files["frame"]
     tmp = tempfile.NamedTemporaryFile(delete=False)
@@ -23,9 +25,9 @@ def detect_live():
 
     try:
         result = DeepFace.analyze(
-            tmp.name,
+            img_path=tmp.name,
             actions=["emotion"],
-            models={"emotion": emotion_model},
+            models=models_cache,
             detector_backend="mediapipe",
             enforce_detection=False
         )
@@ -35,9 +37,12 @@ def detect_live():
 
     os.remove(tmp.name)
 
+    dominant = result[0]["dominant_emotion"]
+    scores = result[0]["emotion"]
+
     return jsonify({
-        "emotion": result[0]["dominant_emotion"],
-        "scores": result[0]["emotion"]
+        "emotion": dominant,
+        "scores": scores
     })
 
 if __name__ == "__main__":