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Stuttering when using more than 1 Footage.

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Gustavo GewehrStuttering when using more than 1 Footage.
by on Jun 18, 2010 at 6:03:33 pm

Hey Guys,Im having a problem when Rendering,when I put an effect footage like a Muzzle Flash or Blood above my filmed footage,it stutters! I tried a plenty of formats already,conformed all the video to a framerate,checked composition framerate and it keeps stuttering.
here's a video i did for testing :


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Dave LaRondeRe: Stuttering when using more than 1 Footage.
by on Jun 18, 2010 at 6:21:46 pm

On my lousy internet connection at work, EVERYTHING plays back poorly. But I bet I still know what's going on.

If you're not running AE 10 (aka AE CS5), but an earlier version, AND you shoot on an HDV camera, you've got footage problems:

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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