For example, The Last Of Us Part II is near 100 GB, but if I record the whole game (20 hours or so) in 4K, that video will be like 200-250 GB.
Can anyone explain why?
In: Technology
As someone who has worked with C-100s, Canons, Arri and Bolex film cameras, Sony, and some others, I’m not quite sure myself, there. I know it has to do with the information that is being processed to create the dynamic range of color and detail. If you’re recording audio, that adds a few GBs, but nothing crazy. Often, camera settings will include other file information, so instead of recording *one* take of your playthrough, you’re actually recording “multiples” because there are other files created, along with the video files.
Still, the main 4K video file is rather large in comparison with these other files that are made. I want to say–if memory serves me correctly–that in order to create moving images, you’re actually recording +/- 24-30 frames per second. Instead of being a manageable 4:3, with 4K you’re getting your movie-standard 16:9 aspect ratio. So, right there you’ve just added a slew of information that has to be processed and put together.
After that, there’s all of the actual information that the camera sees. I believe the process to create 4K footage uses additional alpha channels, which creates a heavier file.
Essentially, if I remember my teaching correctly, the files are compressed data at 24-30 times. Instead of a single 4KHD image, there are 24-30 per second. (60s x 60m) x 2h = 7,200 large files composed of–on average–30 large files = 216,000 large files.
From there, it’s something to do with each file having to retain its information–i.e. each of the 216,000 large files–versus a coded game that presents the information, essentially, through characters arranged a certain way. Instead of having a specific code that says “Joe is caucasian,” video files carry layers of code that say “this is green,” “this is red,” “this is blue,” “this is white,” “this is black,” “this is magenta,” “this is yellow,” etc., to create Joe, who is a caucasian.
Now, don’t quote me. It’s been a while since I’ve been taught all of this. I hope it makes sense.
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