Update app.py

app.py

@@ -66,6 +66,9 @@ def convert_video(video_file, quality, aspect_ratio, video_url, api_key, upload,
 
         aspect_ratio = get_aspect_ratio(input_path, aspect_ratio)
 
+        # Check if resolution is a list, if not convert it to a list
+        resolution = [resolution] if not isinstance(resolution, list) else resolution
+
         for res in resolution:
             scale = "-1:" + str(res.replace("p", ""))  # we convert '1080p' to '-1:1080'
             output_path = get_output_path(input_path, temp_dir, res)  # pass the resolution to create a unique output file