api output fix

gradio_app.py

@@ -259,11 +259,15 @@ def process_media_unified(media_input, pupil_selection, tv_model, blink_detectio
         if hasattr(media_input, 'name'):
             # It's a file object (video)
             file_path = media_input.name
-            if is_video(file_path):
+            # Extract file extension from the path
+            import os
+            file_extension = os.path.splitext(file_path)[1][1:]  # Remove the dot
+
+            if is_video(file_extension):
                 plot_img, csv_data, summary_text = process_video_gradio(media_input, pupil_selection, tv_model, blink_detection)
                 combined_output = f"{summary_text}\n\n--- CSV Data ---\n{csv_data}"
                 return plot_img, combined_output
-            elif is_image(file_path):
+            elif is_image(file_extension):
                 # Convert file to PIL Image
                 from PIL import Image
                 image = Image.open(file_path)
@@ -272,7 +276,7 @@ def process_media_unified(media_input, pupil_selection, tv_model, blink_detectio
                 # Unknown file type
                 from PIL import Image
                 error_img = Image.new('RGB', (400, 200), 'white')
-                return error_img, f"Unsupported file type: {file_path}"
+                return error_img, f"Unsupported file type: {file_extension}. Supported video formats: mp4, avi, mov, mkv, webm, flv, wmv. Supported image formats: png, jpg, jpeg, bmp, tiff, webp."
         else:
             # It's a PIL Image or other format
             if media_input is not None: