Upcoming Live Q&A with Joe N Tell

[pozz]

Well, not arbitrarily. 15fps was used in silent film as they found that to br the minimum for cohesive movement (also allowing leeway for hand cranking). ”Talkies” came along and they found that they needed 24fps for lip movements to look like they sync up with the audio

I refer you to the lectures for the historical context. You'll find it very interesting. The range of informed opinions are certainly surprising.

 

[MZKM]

motion blur is that they still use that for animated films (like Pixar movies) where they could easily use different frame rates, yet the settle on these. We're not using film anymore so why would they do that?

Same reason no blockbuster superhero film is in 4K, CGI/animation in 4K and/or high frame rate is just way too time consuming (even Avengers: Endgame is only 2K, despite filming with 6K cameras).

For Toy Story 3, they said a single frame takes 7 to 39 computer hours to render. The run time was around 100min, at 24fps that is 144,000 frames. Let’s say the average render time was 20 computer hours, that would be a total of 2,880,000. Pixar has 4,600 computers in their render farm, so that is ~626 real time hours, aka 26 days running 24/7.

So nearly a whole month, but of course they don‘t just render a film once, any time they make changes they have to render that scene again.

That’s at 24fps, and while rendering time won’t double when going to 48fps, it still is going to increased, moreso. From what I can tell, Toy Story 4 was in 4K as well as Pixar’s & Disney’s latest releases, so that has added a ton of render time in that regard.