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problems rendering a video in after effects, video jumps and sometime it looks too slow.

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andrea prieto
problems rendering a video in after effects, video jumps and sometime it looks too slow.
on Sep 12, 2011 at 6:48:03 pm

I'm new to after effects and got problems rendering my video. I don't know what i did wrong but basically this is what i've been doing:
I created a composition using a video i recorded in a .MTS format
I applied cartoon effect, photo balance, some textures and i rendered my composition using the settings in the pictures below.

The quality of the video is perfect but it jumps like if the rendering wasn't done correctly when i play it in my computer.. some bit are played too slow. I had done the same thing with a different and longer video and everything looked fine but i can't work out what i've done wrong with this one.

PLEASE HELP!!!







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Dave LaRonde
Re: problems rendering a video in after effects, video jumps and sometime it looks too slow.
on Sep 12, 2011 at 7:08:46 pm

I can't tell which version of After Effects you're using, and it's important. If you do NOT use AE CS5 or AE CS 5.5, the following is probably the reason for your problem:

Dave's Stock Answer #1:

If the footage you imported into AE is any kind of the following -- footage in an HDV acquisition codec, MPEG1, MPEG2, AVCHD, mp4, mts, m2t, H.261 or H.264 -- you need to convert it to a different codec.

These kinds of footage use temporal, or interframe compression. They have keyframes at regular intervals, containing complete frame information. However, the frames in between do NOT have complete information. Interframe codecs toss out duplicated information.

In order to maintain peak rendering efficiency, AE needs complete information for each and every frame. But because these kinds of footage contain only partial information, AE freaks out, resulting in a wide variety of problems.

I'm a Mac guy, so I like to convert to Quicktime movies in the Animation or PNG codecs; both are lossless. I'll use Apple's Compressor, Adobe Media Encoder or Quicktime Pro to do it.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Todd Kopriva
Re: problems rendering a video in after effects, video jumps and sometime it looks too slow.
on Sep 13, 2011 at 6:24:15 am

See this:
"Why is my output file huge, and why doesn't it play back smoothly in a med...

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
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