A is a lossless rip of a 4K Ultra HD Blu-ray disc. Unlike a standard "rip" or "encode," which compresses the video to save space, a remux takes the original video bitstream and audio tracks directly from the disc and repackages them into a single container—most commonly an MKV (Matroska) file.

Because nothing is compressed, these files typically range from 50 GB to 100 GB per movie.

4K remuxes boast bitrates between 60 Mbps and 144 Mbps , compared to the 15–25 Mbps typical of 4K streaming. Why Quality Seekers Choose Remux Over Streaming

For home cinema enthusiasts, "4K Blu-ray remux" represents the absolute pinnacle of digital movie quality, short of owning the actual physical disc. While streaming services like Netflix or Disney+ offer 4K content, they cannot match the sheer data density and lossless fidelity of a remux file. What is a 4K Blu-ray Remux?