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View Full Version : Uneven frames when speeding up compositions / image sequences

Hamfam
12-14-2008, 03:34 PM
Hey there, I have a 25fps image sequence in a 25fps composition. When I speed up the image sequence whether it be through time stretching or timeremapping, it doesn't seem to evenly space the frames.

For example, 2 frames will be small increments then another frame will be a large increment. It isn't hugely noticable, but it's enough for my client to think it looks too jerky.

Now I realise I can either re-render the frames from Maya in it's actual new time frame, or apply frame mixing etc. however, these options are either time consuming or bring up other problems.

Really, there must be a way for After Effects to accurately speed up an animation, so that each frames increment is even to another - with no jerkiness?

Thanks a lot, looking forward to hearing your suggestions!
Mylenium
12-15-2008, 06:24 AM
Really, there must be a way for After Effects to accurately speed up an animation, so that each frames increment is even to another - with no jerkiness?


Umm, I don't follow. It does exactly that?! The more important question is, what kind of speed treatment you are doing. Just like most other programs, AE is based on time, not on frames, so if you are using crooked values that aren't multiples of the source framerate, naturally there is no way for AE to derive discrete frames and some will be duplicated, others skipped. Simple math - just like dividing an odd numer with an even one will have "ugly" values as results, so AE's sampling may coincide with unsuitable frames, if the rounded off increments fall onto the (visually) "wrong" frame.

Mylenium
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12-15-2008, 06:24 AM
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