alt Hacker News> 4GiB of completely uncompressed 1080p video in memory is only 86 frames
How is that data stored?
Because (2^32)÷(1920×1080×4) = 518 which is still low but not 86 so I'm curious what I'm missing?
Replies
brokencube • yesterday at 10:39 PM
I would guess 3 colour channels at 16bit (i.e. 2 bytes)
(2^32)÷(1920×1080×4×3×2) = 86
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Apparently with 24 bytes per pixel instead of bits :) Although to be fair, there's HDR+ and DV, so probably 4(RGBA/YUVA) floats per pixel, which is pretty close..
> How is that data stored?
So glad you asked. It's stored poorly because I'm bad at maths and I'm mixing up bits and bytes.
That's what I get for posting on HN while in a meeting.