fix UnboundLocalError

app.py

@@ -94,14 +94,16 @@ def generate_video(source_image, driven_audio, preprocess='crop', still_mode=Fal
         raise AttributeError("No face is detected")
 
     # Determine reference coefficients
+    ref_pose_coeff_path, ref_eyeblink_coeff_path = None, None
     if use_ref_video:
-        ref_pose_coeff_path, ref_eyeblink_coeff_path = None, None
         if ref_info == 'pose':
             ref_pose_coeff_path = ref_video_coeff_path
         elif ref_info == 'blink':
             ref_eyeblink_coeff_path = ref_video_coeff_path
         elif ref_info == 'pose+blink':
             ref_pose_coeff_path = ref_eyeblink_coeff_path = ref_video_coeff_path
+        elif ref_info == 'all':
+            ref_pose_coeff_path = ref_eyeblink_coeff_path = None
 
     # Generate coefficients from audio or reference video
     if use_ref_video and ref_info == 'all':