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Tom3090748180r2
Participant
July 6, 2023
Question

Pre-comps Auto Fps

  • July 6, 2023
  • 2 replies
  • 975 views

my main compositions fps is 60, my footage's fps is 23,976, and when i precompose the footage rather than the precomp becoming 60 fps, it becomes the same as the source. before anyone says that's how it's always been, no it isn't. my prefrences got corrupted, then everything got messed up, prior to this i would make a precomp, and it would be the same fps as my main comps, not the source i'm precoming. 

2 replies

R
Community Expert
Rick GerardCommunity Expert
Community Expert
July 6, 2023

I have to ask why you have set the main comp to 60 fps when the footage is 23.976? YouTube and Vimeo will throttle 60 FPS uploads to 30 fps for most users because of the bandwidth. Motion Blur in the footage will not match the motion blur for elements in the main comp. Your file size will be more than twice as large as it wold be if you matched the footage frame rate. Render times will be a little more than twice as long. Full Resolution previews will be about half as long.

 

About the only thing you gain in a 60 fps comp is a little more latitude with controlling Judder (the interraction of motion with frame rate that causes things like title rolls to appear to jerk around a bit). The human eye's effective shutter speed is somewhere close to 1/50 of a second, and that's very close to the shutter speed of a motion picture camera running at 24 fps. 

 

Just make sure that you really need 60 fps. If you are going for a cinematic look, it's really hard to get it at 60 fps. 

 

 

 

Shebbe
Community Expert
ShebbeCommunity Expert
Community Expert
July 6, 2023

@Rick Gerard you go off-topic on a rant on why someone shouldn't use 60fps expecting someone wants to deliver a (cinematic?) youtube video. However, you don't know anything about the original poster's project, client, creative intent and deliverable requirements. 

 

I think it's quite rude to lecture someone on a topic that the thread isn't even about even if you are correct on whatever it is you're explaining. Especially when you can't gague someones skill level. It's not all amateurs that start topics on forums.

    R
    Community Expert
    Rick GerardCommunity Expert
    Community Expert
    July 6, 2023

    Just trying to get the OP to understand how things work and hopefully make better choices. Creating a 60fps comp can be important, but using cinematic frame rate video in that comp kind of defeats the purpose unless there is a compelling reason for the higher frame rate.

     

    I base my replies on many years of helping AE users with problems they cause themselves because they have not fully understood how things work. I have also spent a lot of time in my career in the movie business educating clients so I could improve the deliverable and save time. I'm sorry you were offended.

    Mylenium
    Mylenium
    Legend
    July 6, 2023

    What options are you using? Sounds like you're not using "move attributes". Nothing wrong here then. That's how it always has been - if you're moving a single footage source into a pre-comp with "keep attributes (in parent comp), AE will use the source framerate.

     

    Mylenium

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