refactor: remove ffmpeg-python

Author: wxg0103

pyproject.toml

@@ -54,7 +54,6 @@ django-celery-beat = "^2.6.0"
 celery-once = "^3.0.1"
 anthropic = "^0.34.2"
 pylint = "3.1.0"
-ffmpeg-python = "^0.2.0"
 pydub = "^0.25.1"
 cffi = "^1.17.1"
 pysilk = "^0.0.1"