Add validations

app.py

@@ -34,6 +34,19 @@ def create(
 
     output_path = f"output_{mode}_{used_seed}.mp4"
 
+    # Validate mode-specific required parameters
+    if mode == "image-to-video":
+        if not input_image_filepath:
+            raise gr.Error("input_image_filepath is required for image-to-video mode")
+    elif mode == "video-to-video":
+        if not input_video_filepath:
+            raise gr.Error("input_video_filepath is required for video-to-video mode")
+    elif mode == "text-to-video":
+        # No additional file inputs required for text-to-video
+        pass
+    else:
+        raise gr.Error(f"Invalid mode: {mode}. Must be one of: text-to-video, image-to-video, video-to-video")
+
     config = InferenceConfig(
         pipeline_config="configs/ltxv-2b-0.9.8-distilled.yaml",
         prompt=prompt,