Update app/utils.py

app/utils.py

@@ -92,6 +92,6 @@ def webm2mp4(input_file: str) -> str:
 
     ff_video = "ffmpeg -i {} -c:v libx264 -c:a aac -strict experimental {}".format(input_file, path_save)
 
-    subprocess.run(ff_video, check=True, capture_output=True, text=True)
+    subprocess.run(ff_video, shell=True, check=True, capture_output=True, text=True)
 
     return path_save