Blu-ray or Bluray rips (once known as BDRip) are encoded directly from a Blu-ray disc source to a 2160p, 1080p or 720p (depending on the source), and use the x264 or x265 codec. They can be ripped from BD25, BD50 disc (or UHD Blu-ray at higher resolutions or bitrates), and even Remuxes. BDRip now refers to a Blu-ray source that has been encoded to a lower resolution (i.e. 1080p down to 720p/576p/480p). BDRips can go from 2160p to 1080p, etc as long as they go downward in resolution of the source disc. BRRips, which are often mistaken for BDRips, are an already encoded video at HD resolution that is then transcoded to another resolution (usually SD). BDRips are not a transcode, but BRRips are, which change their quality. BD/BRRips in DVDRip resolutions can vary between XviD/x264/x265 codecs (commonly 700 MB and 1.5 GB in size as well as larger DVD5 or DVD9: 4.5 GB or 8.4GB). Size fluctuates depending on the length and quality of releases, but the higher the size the more likely they use the x264/x265 codecs. A BD/BRRip to a lower resolution looks better, regardless, because the encode is from a higher quality source. BDRips have followed the above guideline after Blu-ray replaced the BDRip title structure in scene releases.
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