: Indicates the source type and processing method (lossless rip). .part23 : The 23rd sequential volume in the archive.
The file is a specific data segment within a multi-part compressed archive, typically used to distribute high-definition video content. What is a BD Remux?
: Because there is no compression beyond the original disc's encoding, it offers the highest possible visual and audio fidelity (lossless relative to the source).
A refers to a "Blu-ray Remux." This is a file created by taking the raw video and audio streams directly from a physical Blu-ray disc and placing them into a modern container format, such as Matroska (.mkv), without re-encoding the data.