Cleaned up ffmpeg backend.
Cleaned up ffmpeg backend.

PrincessTeruko/ComfyCafe,PrincessTeruko/TeruImages,PrincessTeruko/ComfyCafe,PrincessTeruko/TeruImages,PrincessTeruko/ComfyCafe,ComfySoft/ComfyCafe,ComfySoft/ComfyCafe,ComfySoft/ComfyCafe,ComfySoft/ComfyCafe,PrincessTeruko/TeruImages