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H.264 footage and apple prores 422 imported in AE...??? :S

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Brynn Chadwick
H.264 footage and apple prores 422 imported in AE...??? :S
on May 5, 2010 at 9:29:19 am

Hey Guys im using FCP to do alot of my editing work i use a 7D and convert my h.264 files to apple proress 422 for FCP to edit and what not but lately ive wanted to create a ramped slow mo effect and so its been said that AE does the best job at that, so now I have AE which im very new to and when i import the clip into AE it plays back very choppy and slow and even when I have edited it and rendered it, it plays the audio and maybe like 3 frames from the clip. Im completely lost really i need help :S hope someone can help please :D


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Dave LaRonde
Re: H.264 footage and apple prores 422 imported in AE...??? :S
on May 5, 2010 at 3:41:36 pm

If I read your post properly, you're trying to use H.264 footage in AE. The symptoms you describe certainly sound like that's what you're trying to do.
Unless you just got the brand-new AE 10, you can't. Here's why:

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.


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


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Dave LaRonde
Re: H.264 footage and apple prores 422 imported in AE...??? :S
on May 5, 2010 at 7:44:38 pm

...and when working with ProRes in AE, it may not hurt to keep handy the information found in the following link:

http://blogs.adobe.com/toddkopriva/2009/03/prores-422-colors-in-after-eff.h...


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


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