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klsym
Participating Frequently
Aug 21, 2023 3:21 PM UTC
Question

After Effects - Rendered file dimensions smaller than composition settings

Hi there, 

 

Hoping for some help here. 

 

I've been working on a composition at 6336 x 288 px however when checking the size after rendering it is coming out at 4096 x 186 px. 

 

I'm struggling to find whats causing this to downsize - I have attached the composition, render and output settings along with the file info after rendering. 

 

Any help would be appreciated - we are working to a tight deadline so need this resolved asap. 

 

Many thanks! 

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4 replies

Mylenium
Mylenium
Legend
Aug 21, 2023 4:27 PM UTC

Compressed formats like MP4/ H.264 have built in limits or else there magic doesn't work. Dimensions must be multiples of two and they have a minimum and maximum. Some of that can be tweaked by switching MPEG levels and changing settings at the cost of less compatibility, but some things can't be changed. That's why for your banderole you may need to resort to the native playback CoDec of whatever device is used.

 

Mylenium 

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klsymAuthor
Participating Frequently
Aug 21, 2023 6:01 PM UTC

Thank you - this helped me understand more what I was dealing with and I was able to find a work around 🙂

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Mylenium
Mylenium
Legend
Aug 21, 2023 3:33 PM UTC

You cannot arbitrarily mess with standardized formats like H.264. There's a reason why there is such a thing as broadcast specs and format constraints that must follow certain rules. This will never work.

 

Mylenium 

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klsymAuthor
Participating Frequently
Aug 21, 2023 3:41 PM UTC

Hi Mylenium, 

 

Thank you fo your reply! 

 

I'm quite new to motion design / after effects and learning as I go - are you able to expand on what you mean please? 

 

I simply set up the file to the needed dimensions / resolution then used the settings that automatically came up for H.264 so not sure what you mean by mess with or what specs and constraints are being broken? 

 

Any further help is appreciated! 

 

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