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 11 months ago by kingofallnorway@alien.top to c/datahoarder@selfhosted.forum

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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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[–] DesertCookie_@alien.top 1 points 11 months ago

If you want constant quality, it's better to also encode using quality-based encoding instead of bitrate-based encoding. It allows rh encoder to save space where there's a non-complex scene and use more in more complex ones. It might, for example, be able to encode the few seconds of back screen at the begging of some movies in 50KB or something similarly small where bitrate-based encoding uses the full bitrate generating multiple MB.

This way you can easily get a 4K encode down to 4-8GB. Animation compresses incredibly well without percievable quality loss. Anything with grain will quickly balloon in size. Something like Star Trek (2009) with its insane amount of noise is more than twice that size if aiming for VMAF >95.