this post was submitted on 27 Nov 2023
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Data Hoarder
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We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
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I know that this is a non-answer, but the best thing to do is reencode a few files at multiple bitrates and see where the line is for you.
Try to get a few dark scenes, since that's where compression artifacts tent to be most noticeable.
Also you’ll need to increase bitrate or adjust parameters depending on how much film grain there is. 70s Italian movies are some of the worst for that, lovely crisp and gritty grain but it gets absolutely obliterated when compressed incorrectly.