Update app.py

app.py

@@ -367,10 +367,11 @@ def create_video(script_text: str, generate_script: bool, music_path: str | None
         output_path = os.path.join(RESULTS_DIR, f"video_{task_id}.mp4")
         final_video.write_videofile(
             output_path,
-            fps=24,
-            codec="libx264",
-            audio_codec="aac",
-            threads=2,
+            fps=15,
+            codec="mpeg4",
+            audio_codec="mp3",
+            threads=1,
+            preset="ultrafast",
             logger=None,
             verbose=False
         )