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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For H.264 and H.265 media, what bitrate and file size is as close to original quality as possible or the same as original? (alien.top)

submitted 9 months ago by [email protected] to c/[email protected]

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I recently started building a movie/show collection again on my home NAS.

I know that generally H.265 files can be 25-50% less bitrate than H.264 and be the same or better quality. But what's the golden zone for both types? 10 Mbps for a 1080p H.264 movie? And would it be like 5 Mbps for H.265 1080p to be on par with H.264? What about 4K?

For file size: would it be 25GB for a 2 hour 1080p movie to be near or at original Blu-Ray/digital quality?

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[–] [email protected] 1 points 9 months ago (1 children)

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.

[–] [email protected] 1 points 9 months ago

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.