Update app.py

app.py

@@ -9,6 +9,7 @@ def read_subtitle_file(subtitle_path):
     return os.path.basename(subtitle_path), subtitle_content
 
 def add_subtitle_to_video(input_video, subtitle_file, subtitle_language, soft_subtitle):
+    subtitle_file_path = subtitle_file.replace(" ", "\\ ")
     video_input_stream = ffmpeg.input(input_video)
     subtitle_input_stream = ffmpeg.input(subtitle_file)
     input_video_name = os.path.splitext(os.path.basename(input_video))[0]