HypoX64/DeepMosaics ? reverse-engineered prompt

Build me a Python app that can automatically remove mosaics from images and videos, and also add mosaics back in if I want that. I want it to work on both single images and video files, with a simple command line flow and a basic GUI for easier testing on Windows if that makes sense.

Use pre trained models for the mosaic detection and cleanup part, and make it easy to drop model files into the right folder and run the app without a lot of setup. If the user does not have a GPU, it should still run on CPU, just slower. Please include clear instructions for installing dependencies, running a quick example, and where the output files are saved.

Also make sure it can handle common media formats through ffmpeg, and if needed, look up current docs online for any tricky install or runtime details. Keep the project organized so I can later train on my own dataset or swap in different models.