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Re: Foundry Keylight 1.1 error in AE CS3

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Re: Foundry Keylight 1.1 error in AE CS3
by Dave LaRonde on Jun 27, 2008 at 6:20:23 pm

[Anjum Gill] "Type: MPEG Movie "

AHA! MPEG! That's one reason why you're having trouble. Read on....


Dave's Stock Answer #1:

If the footage you imported into AE is any kind of the following -- Native HDV, MPEG1, MPEG2, mp4, 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.


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


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