A "Remux" is a lossless copy of the original content from a physical source, such as a Blu-ray or UHD disc. Unlike typical encodes (like x264 or x265), the video and audio data are not compressed further; they are simply moved into a new file container, such as .mkv .
: "Dual" typically suggests the inclusion of two primary audio tracks (e.g., original language and a dubbed version). Key Terminology
: Usually Matroska ( .mkv ) to hold multiple subtitle and audio tracks. Archive Information: Why "part05.rar"?
: Professionals use specific curves and averages to measure the quality of such files against the original source ( Streaming Learning Center ).
