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Frame Rates for Composition and Render
Hello,
Some footages I am using have 25fps, while others have 29.97fps.
1. Should I set the composition with 25 or 29.95fps?
2. Should I export using 25 or 29.95fps?
This will probably be for HDTV.
Currently, I have the composition at 29.95fps with different animation effects applied. When I change the fps to 25fps, a weird thing happened – a section of a layer that had puppet tool animation disappeared.
Thanks.
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7 Replies
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Thanks, Dave.
It will most likely be for HD TV. I have Adobe Master CS4 on a Windows Vista. Let me know if there is any other information you need.
And I was also wondering if there were general rules to follow:
– Is exporting at higher frame rate better even if some of the footages have less?
– If I export at 25fps, is it still better to set up the composition at 29.97fps? -
Hi, if you footage have 25 fps and you put it in a 29,97 fps comp the video is going to run faster than the original so you have to modify the speed of the layer to make it correct.
I recomend that if you have to deliver the final work in 29.97 fps first of all convert all your footage to that fps and work with all your material, comps and exports on the same rate…
I hope this help you…Lucian Durietz
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Okay, I see. Thanks.
Before I read your reply, I thought that footages with lower fps duplicate some frames to match the timing. If speeding up of footage is the only outcome of mismatching fps, then it will not be a big deal in this project I’m working on.
So does interpreting the footage in After Effects to different fps count as converting?
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Dave,
I’m not sure about required fps yet. So when I find out, I’ll make sure all the assets match. What do you do for instances when the client does not know or they will be doing the final preparations?
I am delivering in Quicktime movie with animation codec at 1920 x 1080, progressive. It may be for broadcast. I want to deliver in highest quality and also make it most convinient for client to make conversions for broadcast, if they decide to.
Thanks again.
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Got it. Thanks!
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Actually what you can do is first create the project in 29.97 fps 1080p, then if you need 25 fps, create a new composition with that framerate, and drag the 29.97 fps comp into it. The new comp can pull interframe data from the 29.97 fps project, and it will be as if it was created in 25 fps. This works perfectly with graphics created in After Effects, though can get a little tricky when working with pre-rendered footage (there may be some frame blending if you enable it).
Jon Geddes
http://www.precomposed.com -
I agree with the frame blending, it does not look good, which is why it should be disabled.
However, the animation is smooth when the 29.97 comp is placed in the 25 fps comp. As I said, it appears After Effects can pull inter-frame data from the 29.97 comp. What this means is that it will not render in 29.97, then convert to 25 fps, but instead will render the animation at true 25 fps. Sure, your keyframes won’t line up exactly with a frame in the 25 fps comp, but this shouldn’t make any noticeable changes to it visually.
Give it a try… I doubt you will be disappointed.
Jon Geddes
http://www.precomposed.com
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