: Why is 4K footage of a game bigger than the game itself?

Question

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

Answer 1

Here is a simple program/problem:

y = 1 + x, write down the values of y for x ranging from 1 to 1000

Now try writing out the answer (mentally anyway!)

You can easily see that the answer/output is far longer than the program used to create that answer/output. Similarly a game is a program that does a lot of calculations and the results are numbers used to drive the monitor and the speaker etc etc. The output can be far larger than the program. There is no reason to expect the program to be smaller, equal to or larger than the output it creates.