Re: In a year or two? Maybe in a decade or two.
Thanks for spotting these and for correcting me.
I made a mistake in my calculations, off by one order of magnitude. 28 TB didn't seem so small before lunch.
It should be 500 TB, not 28 TB. Not 2000 tapes, though, just 84 LTO-7 (less for T10000 and TS1150, even less for next generation).
If anything, I gave a ceiling of what you might reasonably expect as the absolute maximum that's going to be needed.
In the coming years, more and more content will be shot on high frame rates and 120 fps is definitely the maximum above which nobody is going to care. 60 fps is going to be the sweet spot, maybe even as low as 48 fps. Nobody's going back to 24 fps, though.
8K -- television set makers are demanding that and there's really no point in making movies 4K-only. I don't see the point of 4K, let alone 8K, other than the fact that it will make 1080p sets cheaper in the next few years.
Storing just the left frame and difference is not effective, since it doesn't make the resulting stream easier to compress -- the shift between the frames is not the same in all planes, the end result would be probably harder to compress or you'd expect horrific artifacts. If anything, the two frames are stored side-by-side.
You're right about storing just two frames, though. After all, a stereoscopic camera doesn't record three images, just two and must use either one or the other for 2D. So, 334 TB.
90 minutes, 120 minutes. If you shoot state of the art, you're going to make it longer rather than shorter, but it doesn't make an order of magnitude difference.
If my calculations were off, let's rehash them:
5400 seconds × 60 fps × 2 images × 8K×4K × 48 bits = 125 TiB*
*) 138 TB, I made the mistake of assuming binary prefixes previously (so an LTO-7 cartridge has just 5.46 TiB).
Four times less, so just 23 LTO-7 tapes.
That's just for the master. The full movie as-shot will have many retakes, so probably ten times that number, but still something that's more suited for tape than disk (although nobody's going to store the whole movie forever, unless it becomes a cult classic and will pay for its storage, so the studios will move back to reclaiming the stock for silver, so to speak).
And indeed, a lot of compression. You're right that cameras and storage can't handle the throughputs and raw capacity required at 95 Gbps, so we're going to be getting there very slowly. But yes, a handful of tapes (or disks) for the resulting whole movie is about right. Doesn't mean that a studio won't need several libraries to store all those movies.