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jumpy footage
Hi guys. Something very weird is happening and I can’t figure out what. I am working on a project where we have 360 fly arounds from a 3D program. I bring the files over to AE CS3 as file sequence and interpret the footage as 25fps (AE was saying that it was at 30fps). Along with this sequence, there are a lot more stills that are just panned. When I render, this jpg sequence looks very jumpy as if the frame rate was wrong. The most weird is that when I render this jpg sequence on a AE project of its own, it’s fine.
Does anyone have any ideas? Thanks. -
7 Replies
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I render it and watching on both quicktime and media player. Jumps on either.
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The machine is a AMD atlhon (I guess not the best). Thank you very much. I’ll give a go on another machine and’ll post the results. Thanks again!!!
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the problem is most likely not the processor, but the hard drive. if you had rendered your file to an uncompressed avi or lossless animation mov, or any other very large/high data rate file type, then many typical hard drives will have trouble keeping up with the data rate. if you were to render using a compressed codec, like photojpeg (or others that dave mentioned) then the file size and data rate would decrease and the drive may keep up.
you mentioned that ae interpreted the image sequence as 30 fps…. if you work primarily in 25 fps, then you can set ae to use 25 fps as the default for image sequences. choose preferences>import and set the framerate for images sequences to 25. it won’t help your play out issue, but it will save you a few clicks every time you work with sequenced footage…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
I noticed that the footage has been rendered as NTSC(30fps). When I bring it over into AE and interpret it to 25fps, this could be the cause of the jumping? Thanks.
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conforming footage to a new frame rate via the interpret footage settings may create a slow motion or fast motion effect due the changing the speed/rate thatt he footage is played at, but it shouldn’t create any jumpiness. so setting ntsc 29.97 fps footage to playback at 25 fps should only slow the movement of the footage (a slow-motion effect).
you would also see this in the ram previews along with the renders and it sounded like you only saw the problem in the rendered footage in a player…
just to clarify, when you say jumpy, you mean time jumps, pauses or skips during playback, not the video jumping up or shifting position in the frame, right?
if it is that the render is pausing/skipping as it plays back, it is most likely the file’s data rate is too great for your drive to playback smoothly. how is your file rendered… what file type and codec did you use (uncompressed avi, lossless mov)?
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
It seems that the problem was the codec I was using to output the final rendering. The project consists of 2 imported footages and a bunch of still images. I was rendering the 2 imported footages with the MPEG4 VIDEO CODEC V2 and bringing them in. The final output was being done with the same codec. The jumping was occuring there. I rendered the 2 footages with the h.264 codec and the final output with the MPG4 codec and now it seems the jumping is gone. It doesn’t make any sense to me though.
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Hi I know not a new post but I had the same problem where everything was jumpy but I open the image sequence in quicktime then I did an export as an image sequence and everything seems to be fine now and still looking sweet 🙂
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