phanatomhunter/proton-c ? reverse-engineered prompt

Build me a working Python project for a research video codec that can encode and decode video clips at extremely low bandwidth, especially around 200 to 1600 kbps for 4K footage.

I want a command line tool where I can encode an input video to a custom file, decode it back to MP4, inspect the stream, and run benchmarks against other codecs. Please also include a simple local web demo called something like a studio page on port 3000 where I can upload or pick a clip, run encoding, and play back the result.

The codec should feel like a real end to end system, with a clear preset system, progressive refresh behavior, and support for testing on sample videos. If useful, look up current docs online while building it. Make sure it runs from the repo with a straightforward script and includes tests so I can verify the encoder and decoder work correctly.