this post was submitted on 28 Feb 2024
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1.4Pb (~175TB), the quoted number of movies is based on a 14GB movie which is very small (most BluRay disks hold somewhere between 25 and 50GB) and no discussion about write speed, so basically this is cool research that someone has done and is no closer to a commercial product that any of the dozens of other articles that have come out on this topic in the last 15 years
And I believe 4k blurays are on average around 100 gb? So that will be about 1800-2000 movies. Still a lot, but not the 14.000 they say.
The rips I pirate aren't re-encoded and are usually in the range of 50-75GB, depending on the length of the film.
Hmm, interesting. I guess on actual Blurays they would have space for extras, menus, sometimes different dubs etc, so that makes sense!
From the article:
If this was a response to write speeds they meant the speed at which data can be written to the disc, not the time ot takes to build the disc. Read/Write speeds are a standard measure used to tell whether something would be efficient to use. For example one could say storing an OS on a DVD and booting would be dumb because it would run extremely slow, where as the read speed for playing music or a movie off it wouldn't be an issue as it doesn't need higher performance for such.
I rip enough physical media to tell you that post-compression 14GB is not far from average for a 4K movie. I guarantee that Netflix isn't storing those any bigger than that. Hard drives don't grow on trees, you know?
It's still good to know where the top end of optical storage is, even at an academic level, even if these end up not being widely used or being used for specific applications at smaller capacities. We'll see where or if they resurface next, but I'm pretty sure we're not gonna get femtosecond lasers built into our laptops anytime soon.
Streaming services definitely don't give you full quality files. They're compressed to save bandwidth. Netflix only uses about 7GB per hour in 4k. That's about the exact size of the higher quality 1080p movies I download.
It's usually less than 7gb per hour, it ranges from 2 to 7GB, it adjusts butrate on the fly. Netflix quality sucks.
Edit: realized I typed butrate instead of bitrate, it fits, so I'm leaving it.
Yeah it's fine, especially with recent codecs like AV1 and you'd expect future codecs to improve further.
These aren't really trying to target a commercial product, at least not anyway. For now these are of interest to enterprises.
I could see them being archival backups for TV broadcast, quite a few are still using tapes for long term archive.