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A 1080p remux and a 1080p re-encoded Blu-ray copy can share the same frame dimensions but differ in size and compression. The filename alone does not establish quality, source authenticity or playback compatibility.
What a remux does
A remux moves selected audio, video and subtitle streams into another container without re-encoding those selected streams. Blu-ray video is already compressed, so a remux is not automatically “uncompressed video.” It preserves the source encoding rather than removing its existing compression.
Menus, extras or unwanted language tracks may be omitted. Copying video unchanged does not prove that every audio track or extra was preserved. FFmpeg’s documentation distinguishes stream copying from transcoding.
What BDRip usually means
“BDRip” is an informal label for a copy sourced from Blu-ray, commonly re-encoded to reduce size. It is not one precise technical format. The resulting quality depends on the source, encoder, codec, settings and content.
A careful re-encode can look convincing while using less storage. A heavily compressed one can lose detail or show banding and motion artifacts. Neither “rip” nor “1080p” guarantees a particular bitrate or visible result.
Container, codec and bitrate
- Container: MKV or MP4 organizes streams; it is not the video compression method.
- Codec: determines how video or audio is encoded and which decoders are required.
- Bitrate: affects file size, but comparisons need similar duration, source and audio tracks.
- Audio and subtitles: check the languages, channels and formats you need.
Which suits your player?
Prefer a source-preserving copy when preserving the selected original streams matters and storage is available. A smaller compatible re-encode can be practical for limited storage or a device that cannot decode the original format. Compare difficult scenes at normal viewing distance instead of declaring one label universally better.
Verify the TV or player supports the container, video profile and audio format. Network bandwidth can also matter for larger files. Our video-editor guide explains export choices, and disc-burning guide separates data discs from authored playback formats. Use content you have permission to copy and process.