Jerky Footage when Importing PremProj into AE
by Jason McGivern
on
Oct 23, 2009 at 9:24:46 pm
I've tried troubleshooting here a number of different ways but whenever I import a Premiere Project into AE it comes out jerky on the export.
1. On export (different settings) from Prem everything fine
2. On export (diff sett) from AE under Make Movie there are parts that jump jerk around. I'm just opening up the comp that AE makes from the Prem timeline and trying to output without any effects.
3. Also, the only changes I make inside the Prem Proj are cuts.
Re: Jerky Footage when Importing PremProj into AE by Dave LaRonde on Oct 23, 2009 at 10:47:57 pm
[Jason McGivern]"...whenever I import a Premiere Project into AE it comes out jerky on the export... Working with AVCHD footage, 720p 60fps. "
That stuff may be okay to edit with in Premiere, but sadly, it won't cut the mustard in AE. I looked up AVCHD on Wikipedia and found this:
"...AVCHD... utilizes the MPEG-4 AVC/H.264 (AVC) video compression codec..."
And that's bad news for you: you'll have to figure out a different workflow, I'm afraid. How come? 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, 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
