Update app.py

app.py

@@ -21,6 +21,7 @@ def add_subtitle_to_video(input_video, subtitle_file, subtitle_language, soft_su
             **{"c": "copy", "c:s": "mov_text"},
             **{"metadata:s:s:0": f"language={subtitle_language}",
                "metadata:s:s:0": f"title={subtitle_track_title}"}
+        )
 
     ffmpeg.run(stream, overwrite_output=True)
     return output_video